Apache Friends Support Forum

Im trying to switch from PHP5 (deafault config after installing Xampp) to PHP4. The process went normal and no problem (Turn Off Apache, Click php-switch.bat, etc.) But whenever i try to Start Apache, it will automaticaly stop. And when i try to switch it again to PHP5, Apache will start with no problem. Can anyone help me how to fix this. (ive seen some topic like this when i search (yes, idid search first) but i didnt understand for its not English)

Which version of Windows?
Which version of XAMPP?
Both omitted.

(ive seen some topic like this when i search (yes, idid search first) but i didnt understand for its not English)

BTW this link has some help with searching the English forum:
viewtopic.php?f=16&t=32670

Sorry for omitting those info.
Im using Window XP SP3 and XAMPP Windows 1.7.0 [Basic package]

But whenever i try to Start Apache, it will automaticaly stop.

When this happens run apache_start.bat file in the xampp folder and it will give more details why apache can't start.