goresci -

Well I am not sure how much this is going to help you. Do you have your php compiled with mssql support? You can make a quick php page that has this:

Then bring that page up in a browser. Scroll down and see if you have MSSQL support. If you do, check to see if you have the line Library Version = FreeTDS.

If you do then I don't know what might be going on. If you don't have the MSSQL info then you don't have that compiled into php.

I wish I could be more help but I set this linux box up a couple of years ago and haven't touched it since. Let me know if you need anything else.