Kigen's Anti-Cheat

helo , my friend just gave me his account 4 days ago since he quitted tf2 and i was intrested cos he had cs:s on the account too , when i tried connecting cs:s servers it directed me to ur site , why am i banned ? my friend told me he never used cheats or hacks and he barely even played cs:S at all, please fix this.

thanks , idan
ID: STEAM_0:1:19448741