Vidiovous

when i download the multiplayer i open it and it says "Unsupported game version! to play you need to have American Truck Simulator v. 1.1.3s [d3f6ead39fcf] ! Do you need help with downlgrading?" and when i click yes it says "could not inject dll into the gane procss (initialization of client failed). Please try launching the game again. If this problem still occurs, please try reinstalling the mod." and when i reinstall it it says the same thing. and when it brings up the page nothing happens its just at the normal home page at www.truckersmp.com PLS HELP

HOW THE F**K DO I MAKE A BAN APPEAL IT DOES NOT LET ME FOR F**K SAKE GOWD ITS SO HARD TO FIND S**T IN THIS WORLD