map loading issues

[lemonlaw95]

every time i try to load a map in SRCDS (or when it tries to load the default map at startup) i get that CModelsomething_isvalid::somethingoranother error and it doesn't load. i removed all the data for the game (garrys mod) and redownloaded it with hldsupdatetool earlier today, and after that is when the problem started. i installed lots of addons and shit, and i'm POSITIVE the maps are in C:\SRCDS\orangebox\garrysmod\maps and i DID spell the titles right, and they DON'T have hyphens in the names. any idea what's wrong with this, and how to fix it? i need it working as soon as possible.

[sXs]

did you tried "+map mapname" in startup line?