fs2002 start up crash


Dear Friends,
I have reinstalled FS2002; When I boot up the sim
a message appears; "ERROR 3RD PARTY SOFTWARE
TRAFFIC.DLL; I follow the instructions to disable this thing but the sim crashes back to my desktop;
I have not had this before, can anyone help me?
I'm desperate to get airbourne!!
Many thanks, in anticipation of your help
Gaztop