php 4.0.4 was working, now not

I had the standard install of php 4 from RH7.1 and apache 1.3.19 and it was working fine. It now returns blank objects for the php scripts and sometimes just the script as text, even phpinfo doesn't work. I also have tomcat 3.3 and jGenerator 1.3.0 integrated into the apache server and both of those are still working fine. I have uninstalled and reinstalled the package to no avail. I also tried upgrading to php4.0.6 and that had the same results too. Any help or insights would be greatly appreciated. thanks, doug