All webpage requests come up blank

[drjones]

I attempted to upgrade to Php5 from php4 using the method outlined in the KB. After following all instructions, the page gave an error about the sessionid. This was because the directory in the php.ini file for where to store the sessions was incorrect. I changed the value and did

websrvmng --reconfigure-all

but it continued to use the old value. I then did

websrvmng --restart

after which the site stoped working all togeather. If I do a request to something like

www.mydomain.com/afilethatexists.html

I get a blank page with no source. The same occurs if I try and open

www.mydomain.com/afilethatdoesntexist.html

The results are the same for a .php file or any other. Every request to the domain comes up empty.

Looking at the application logs I see this:

The HTTP Filter DLL C:\Program Files\SWsoft\Plesk\Additional\Php\sapi\php4isapi.dll failed to load. The data is the error.

Then some messages that say

Could not load all ISAPI filters for site/service. Therefore startup aborted.

So it seems that something still is looking for the old php stuff in the new location, but I have no idea what or where.

Does anyone have any ideas on what I might do to recover from this?