Hi mates, I need help :/

I banned a player in my TF2 servers and he said if I would not unban him, he will lag my server. And it's true, he is using some bugs/exploits to lag the server. I the console appears that message:

Invalid split packet length 9

This message, is flooded kind of 14.000 times each second. So, thats why the server get lag. I'm wondering how he can lag my server with exploits if I use DAF and some secure plugins... Maybe is a new kind of exploit?

Just to make sure, those attacks is not by bandwitch (zombie machines, botnet, etc). I have 2 servers in same machine, he is able to lag 1 server per time. While the server is lagging like hell, I can navegate through the FTP normally, so is not lag by bandwitch. I'm sure is exploits.

Here my config:

Code:
20:49:21 plugin_print 
20:49:21 Loaded plugins: 
         --------------------- 
         0:<TAB>"DoS Attack Fixer, www.sourceop.com" 
         1:<TAB>"Metamod:Source 1.8.8-dev" 
         --------------------- 
20:49:25 meta list 
20:49:25 Listing 4 plugins: 
           [01] SourceMod (1.4.2-dev) by AlliedModders LLC 
           [02] TF2 Tools (1.4.2-dev) by AlliedModders LLC 
           [03] SDK Tools (1.4.2-dev) by AlliedModders LLC 
           [04] SDK Hooks (2.1.0) by Tsunami, psychonic 
20:49:29 meta version 
20:49:29 Metamod:Source version 1.8.8-dev 
         Build ID: 777:14793eb4fa76-dev 
         Loaded As: Valve Server Plugin 
         Compiled on: Aug 16 2011 
         Plugin interface version: 15:14 
         SourceHook version: 5:5 
         http://www.metamodsource.net/ 
20:49:31 sm version 
20:49:31  SourceMod Version Information: 
             SourceMod Version: 1.4.2-dev 
             SourcePawn Engine: SourcePawn 1.1, jit-x86 (build 1.4.2-dev) 
             SourcePawn API: v1 = 4, v2 = 3 
             Compiled on: Dec 15 2011 22:49:02 
             Build ID: 3452:373e1313dcd8-dev 
             http://www.sourcemod.net/ 
20:49:33 sm exts list 
20:49:33 [SM] Displaying 13 extensions: 
         [01] Automatic Updater (1.4.2-dev): Updates SourceMod gamedata files 
         [02] Webternet (1.4.2-dev): Extension for interacting with URLs 
         [03] TF2 Tools (1.4.2-dev): TF2 extended functionality 
         [04] BinTools (1.4.2-dev): Low-level C/C++ Calling API 
         [05] Top Menus (1.4.2-dev): Creates sorted nested menus 
         [06] SDK Tools (1.4.2-dev): Source SDK Tools 
         [07] CBaseServer tools (1.1.0.0): Base server tools (and example of detours) 
         [08] Client Preferences (1.4.2-dev): Saves client preference settings 
         [09] SQLite (1.4.2-dev): SQLite Driver 
         [10] SDK Hooks (2.1.0): Source SDK Hooks 
         [11] <FAILED> file "connect.ext.dll": No foi possvel encontrar o mdulo especificado. 
          
         [12] Socket (3.0.1): Socket extension for SourceMod 
         [13] MySQL-DBI (1.4.2-dev): MySQL driver implementation for DBI 
20:49:36 sm plugins list 
20:49:36 [SM] Listing 39 plugins: 
           01 "Admin File Reader" (1.4.2-dev) by AlliedModders LLC 
           02 "Admin Help" (1.4.2-dev) by AlliedModders LLC 
           03 "Admin Menu" (1.4.2-dev) by AlliedModders LLC 
           04 "Advertisements" (0.5.5) by Tsunami 
           05 "AFK Manager" (3.4.3) by Rothgar 
           06 "Anti-Flood" (1.4.2-dev) by AlliedModders LLC 
           07 "Basic Chat" (1.4.2-dev) by AlliedModders LLC 
           08 "Basic Comm Control" (1.4.2-dev) by AlliedModders LLC 
           09 "Basic Commands" (1.4.2-dev) by AlliedModders LLC 
           10 "Basic Info Triggers" (1.4.2-dev) by AlliedModders LLC 
           11 "Basic Votes" (1.4.2-dev) by AlliedModders LLC 
           12 "CBaseServer Ext Basic Reserve Slots" by predfoot winkerbottom 
           13 "Client Preferences" (1.4.2-dev) by AlliedModders LLC 
           14 "Fun Commands" (1.4.2-dev) by AlliedModders LLC 
           15 "Fun Votes" (1.4.2-dev) by AlliedModders LLC 
           16 "gameME Plugin" (3.9) by TTS Oetzel & Goerz GmbH 
           17 "[TF2] gScramble Team Manager" (3.0.11) by Goerge 
           18 "High Ping Kicker - Lite Edition" (1.0.0.1) by Liam 
           19 "MapChooser" (1.4.2-dev) by AlliedModders LLC 
           20 "Nextmap" (1.4.2-dev) by AlliedModders LLC 
           21 "Map Nominations" (1.4.2-dev) by AlliedModders LLC 
           22 "Player Commands" (1.4.2-dev) by AlliedModders LLC 
           23 "Reserved Slots" (1.4.2-dev) by AlliedModders LLC 
           24 "Rock The Vote" (1.4.2-dev) by AlliedModders LLC 
           25 "SourceMod Anti-Cheat" (0.7.7.1) by GoD-Tony, psychonic 
           26 "SMAC Aimbot Detector" (0.7.7.1) by GoD-Tony 
           27 "SMAC AutoTrigger Detector" (0.7.7.1) by GoD-Tony 
           28 "SMAC Client Protection" (0.7.7.1) by GoD-Tony, psychonic, Kigen 
           29 "SMAC Command Monitor" (0.7.7.1) by GoD-Tony, psychonic, Kigen 
           30 "SMAC ConVar Checker" (0.7.7.1) by GoD-Tony, psychonic, Kigen 
           31 "SMAC Eye Angle Test" (0.7.7.1) by GoD-Tony, psychonic 
           32 "SMAC KAC Global Banlist" (0.7.7.1) by Kigen 
           33 "SMAC Rcon Locker" (0.7.7.1) by GoD-Tony, Kigen 
           34 "SMAC Anti-Speedhack" (0.7.7.1) by GoD-Tony 
           35 "SMAC Spinhack Detector" (0.7.7.1) by GoD-Tony 
           36 "SMAC Anti-Wallhack" (0.7.7.1) by GoD-Tony, psychonic, Kigen 
           37 "Sound Commands" (1.4.2-dev) by AlliedModders LLC 
           38 "SourceBans" (1.4.8) by SourceBans Development Team 
           39 "Spray Tracer" (5.8a) by Nican132, CptMoore, Lebson506th
Sourceop can use my servers to test new versions of DAF to block those exploits. I just beg for help, my server was number #01 in Gametracker and it's not anymore. That guy is damaging my community :/

I will be very greatful with any help. I'm asking for help in Steam Forums and AlliedMods forums. You guys can check what they are suggesting
http://forums.steampowered.com/forum....php?t=2568886
http://forums.alliedmods.net/showthread.php?t=179179

Thank you

PS: I forgot to mention, my servers are WINDOWS