[Grim_]

YSI would not affect the loading of filterscripts as it's an include. Some filterscripts will only work if loaded first, so try loading it first through server.cfg before any others.

If that did not help, or you had no other filterscripts running, please explain in more depth what's happening. Is the filterscript added in server.cfg? Is the .amx of the filterscript inside the correct folder? Does anything print in the console saying the filterscript loaded, or could not be loaded?