We have a product that is working fine. Recently we have installed CSA(Cisco Security Agent). It started giving problems on our products. Our product involves communication to mainframe. CSA service is not necessarily should be running,it is just installed on the machine, gives the problems. It closes all communications,kills some process and thus gives exception. There is a dll namely csauser.dll in system32 directory. If we remove/rename this dll, our product works. Any solutions?