php and asp

i already wrote you that i had a problem running asp and php on one nt-server. i thought it is over, but now, i know when the error appears: when you just have installed the two things on one machine nothing happens my asp-scripts work without any problems. when you just execute any php-file like a html-file with phpinfo() in it, the asp-scripts don't work any longer. when i then go into my internet service manager, stop and restart my iis-webserver the asp-scrits work again. so the error just appears, when you try to execute any php-script. so, please help me, i can't convert the huge number of files at one time so that i could deinstall the asp-machine. both script-languages have to work. ps: my php-version is php4.0.1pl2