need help playing yuri's revenge on the internet

can any body tell how play online in red alert yur's revenge .
i always get this message" yuri's revenge cannot find an available internet connection " what should i do:(

Prob. is your Firewall denies access of YR on the internet or your router blocks some ports or both..

Ure prob. is like mine i dload auto. patch in yr and i go play but i get always error ''yuri's revenge cannot find an available internet connection'' . :( i turned off Firewall like delorean said but still uppear that error again i dunno what to do :( !!! (Sry for the english if i write some mistake's).

do you guys have a legit copy of the game?