ispconfig breaks php5 in apache ?

[Randy]

Dear all,
Please advise me on the following. I've reinstalled my system several times now, but now I'm certain that if I install my debian according to the "perfect setup" howto, and I install apache2 according to "Running Apache2 With PHP5 And PHP4 At The Same Time" howto, that the installation of ispconfig breaks php5.
The following mesage appears in my error.log of apache "PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20050922/ming.so' - libming.so: cannot open shared object file: No such file or directory in Unknown on line 0" .
I've googled it but I haven't found any answer to this problem. Should I only run ispconfig with php4 or can anybody help me to solve this thing, because I would like to be able to serve both php4 and php5 on my servers.

ls -la /usr/lib/php5/20050922/ming.so gives me:
-rw-r--r-- 1 root root 98608 2006-08-31 17:19 /usr/lib/php5/20050922/ming.so

whereis libming.so gives me:
libming:
But I cannot find it ....anywhere

Please help.
Thanks in advance.
Greetings,
Randy