Installation and Apache

[frik]

I now removed apache2 and php5 completely before I reinstall the ISPCP.
During installation it showed that it will install apache2, php5, php4 and some other packages.
After completition Apache2 was indeed installed, but is not able to run php.
When I surf to the admin interface url (http://admin.srv7.rmid.de/) I m now prompted to save a file.
When I do that and then look into it, its the index php file of the ISPCP.

Apache is using the correct conf files also now. I know that because when I use the admin interface url with an directory after it (http://admin.srv7.rmid.de/xxxxxx) then the ISPCP Omega 404 Not found page comes up.

Any ideas why Apache does not read php?

thanks, Friedrich