this is an info that the VC:MP team REALLY NEED to put on the download page.
> VCMP DOES NOT WORK WITH VERSION 1.1 , GTA VICE CITY V1.0 IS REQUIRED so the mod can launch properly after installation.
and since your singleplayer vc is working, i can confirm that your solution is to try downgrading your gta vice city game version to 1.0. I had the same problem before and as far i'm concerned, i did the downgrade method and it did work for me.
> VCMP DOES NOT WORK WITH VERSION 1.1 , GTA VICE CITY V1.0 IS REQUIRED so the mod can launch properly after installation.
and since your singleplayer vc is working, i can confirm that your solution is to try downgrading your gta vice city game version to 1.0. I had the same problem before and as far i'm concerned, i did the downgrade method and it did work for me.