Steam API error

[76561198094064513]

Everytime i try to play Combat arms it says Steam API error: You must be logged into steam to play and i am logged in and i dont know what to do

[76561198066983031]

does it say ur on on steam?
to check go to top left and click steam, if it says go onlin it means ur offline.
if that doesnt help and on bottom middle check if its anything there that says "RESUME ALL", like on right side of "add a game"
hop ethis helps q-q