general - DSM error or Apache error?

I've had Zervex DSM as my Control Panel on my server for over 2 years now. Recently something got screwed up, I assume with the configuration files. I tried reinstalling but it says I'm missing a dependency (dsmapache???). I'm running Apache/1.3.37 already and my 2 virtual hosts are showing up fine so I don't understand what it means I'm missing dsmapache. Here are the symptoms:

When I run "[server]#service dsm start", I get:

Starting dsm: [ OK ]
Starting dsm-ssl: [ OK ]


If I check the status with "[server]#service dsm status", I get:

dsm (pid 27768) is running...

So it seems like everything is okay, right? Even more misleading is that when I go to mysite.com:3000 (which is how I normally accessed the CPanel) I DO get the usual login popup. If I enter the wrong credentials, it even kicks back the login popup, indicating that DSM is at least running and authenticating correctly.

The problem is that when I enter the correct credentials and am logged in, nothing is displayed... just a blank screen. No errors or anything. I managed to find the document root for DSM, which contains a subfolder called 'images'. Within images, I copied a few of the image names and when I entered them into the browser as such:

mysite.com:3000/images/sample1.jpg

or

mysite.com:3000/images/sample2.jpg

etc, etc....

the images show up perfectly. This reconfirms to me that DSM is in fact running and routing correctly. It seems that the problem, which I can't figure out why, is that the pages aren't being parsed.

In the main DSM doc root there are all the pages such as index, filemanager, ftpmanager, etc... except they don't have extensions. Just the names. When I open any of these files in an editor i see some generic Zend html source code followed by garbled junk, which I assume is binary.

here's the kicker if I rename index to indexTMP, for example, and then go to mysite.com:3000 I get:

An error has occured!
File not found

When I rename indexTMP back to index, I get the blank screen again.

All in all, it seems like DSM is running, it's authorizing correctly, it's resolving to its correct doc root but it is NOT running/displaying any of the pages? Anyone have any ideas as to what it may be? Thanks very much!