i cant run the game, some error happens, plz help!!

[balalu]

i dont have steam but i am trying to play esf only with bots creating my own server
if i have my net on i cant play because it keeps asking for a new version of hl and only steam fix that, but if i turn my net off i can start the server but some error appens on hl.exe or something like that
if someone help me i would like a lot