gta tbogt online help please !!!!!!!!!

can someone please help me please !

ok there was a party in my house and someone stole my gta iv . so i bought episodes from liberty city . so i tried to play it onlinewith my friend who also has the ballad of gay tony and it doesnt let me invite him to a game and it doesnt show me his invites ! .do i need the actual gta iv disc even tho i have it installed in my ps3 still .

ANY HELP WILL BE MUCH APRECIATED!!!!

Tough one, well i tried TBOGT on ps3 and there was no one on. Shame really cause would've been cool. Umm so it could be that reason or it shouldn't be that you don't have gta 4, no really sure, but maybe it is cause no ones on. Btw add me if you want gobsmack809 i'd like to play TBOGT with ya.