Screwed up Gmod server.

Hey. Every since the new gmod update I cant join my own server. I ran the Hlds updater tool, and it seemed to have worked, as in, all of my friends could join, but everytime I try to join it closes my gmod.
I really need help fast.
Cause I really wanna play on my server :smiley:
Thanks!
Also, if you do happen to know the answer, please be specific, since I’m pretty new to the server thing.
Thanks so much.

–Sir Mikey