ASP using COM-object error "Object reference not set to an instance of an object"

Question

Greeting fellows, I'am having a strange error. I have build an ASP application which call's a DLL. Inside this DLL I'am calling several VB6 COM-Objects. Everything is working perfectly inside the .Net development area. Then I created a setup and installed the program to a new fresh installed windows 2003 server. Then I run the program; The ASP program works fine and calls the DLL perfectly. But when I called a method for using a COM-object I get an error -> "Object reference not set to an instance of an object". Does some body has an idea what can go wrong? me email adres is [email protected]