CGI installation problem

I've installed yesterday the 4.3.1 on two system: first: NT4 SP6a & IIS second: Win XP Pro SP1 & IIS In both cases the PHP functions normally in ISAPI but not in CGI. In the first case, i've have multiple instances of php.exe in my task manager and my browser (IE6) don't have result before I kill the php.exe. In the second case, i've an error with php interpretor, so i've nothing in the browser. I read that ISAPI is not as stable as cgi, so what can I do in order to use CGI ??? --- My config for extensions is: extension=php_iisfunc.dll extension=php_mssql.dll extension=php_sockets.dll others are off. When I put in comment extension=php_iisfunc.dll, all work fine in CGI. NB: We use php in order to use phpbb forum.