why you have been invited here???

Its because you suck on playing left4dead at the begining .
So First thing you need to know is :
READY CHECK or [ !r ].
everyone play Vrsus mode should know this . When you start the game you should be Ready and the other team Ready too.

so!! I advice you to do ready check !
^-^

thanks for your time . HaHaHa!!