Impossible to drive online on Zolder.

I was able to join the game with any cars but everytime i joined there was a bug (some players were loading permanently '...driver x join the game...' and see these drivers with safety car).

And if i succeed to join the track by insisting click on the red spot (at the bottom leftof the screen) i can drive but i don't hear the sound of my engine, only the other drivers engine are audible.

I tried to delete the 'sidstalker' folders in GTR2 and make new install of the DTM mods. I did it several times but always same bugs.
I was able to play in solo mode and the Mod works but not online for me

As there were only 11 players to race maybe i am not the only one to have trouble with this mod.
Of all the mods Install it is the only one i had trouble online with.

Any Ideas ?