WTF server out of date?

today i tryed to log on the server but got the message "Server out of date"
looks like garry's really after us.. but i was able to connect via the console command

just to tell u we got problem ...
garry hates us..

i hope that u find out something or else i have to make connect a bind xD

Edit: oh and i just found out that the privatserver isn't on my serverlist anymore

oh and please tell me if i'm the only one having that problem