damnit! can't load PHP 4.1.0 as module on XP

Hey everyone, Ok Im trying to load PHP 4.1.0 as a module on my XP(home) system. I included the following lines in the apache httpd.conf file AddType application/x-httpd-php .php LoadModule php4_module c:/php4apache.dll but when I attempt to start Apache service, I get the following message: "The Apache service on Local Computer started and then stopped. Some services sto automatically if they have no word to do, for example, the Performance Logs and Alerts servce" blah blah blah... Of course when I comment out the LoadModule line, everything loads fine. The .dll file is in the correct path, and whats even more bewildering, I had it working before, but I had to recently format and reload system. Any ideas? Thanks Christian