[525]Bugged Walking?

I was screwing around with my server until..
I go on it, log in, and i start walking in one direction (lol) no clipping through everything until it finally went out of bounds and crashed. If it helps, i made it HD and used the walking with it too. idk wats happening, if someone would help it be nice ;] i tried searching for the answer but couldnt :/ lol

EDIT: what really basically happens is when you log in and click somewhere to walk it just starts going south east lol

your server source might be HD i get that problem pretty often look for a guide to make it LD :)

I had this, it was the client.

thanks guys ill look into it