I have a component in VB 6.0 which i used in my web service (at local host), it works fine. But when I deployed this web service on the server, the following error occured.

System.Web.Services.Protocols.SoapException: Server was unable to process request. QueryInterface for interface XXXXX failed.
where XXXXX is my component name.

I have already register the dll and also give full rights to the folder where my project resides. but still it gives the same error. Please resolve my problem ASAP. Thanks

That's not a very friendly way of asking for help. It sounds more like how my customers politely tell me to fix their issues.


I see that error usually when there is some version compatibility issue as we update COM components on our servers. Try unregistering the component, reset the web server and test again (WITHOUT re-registering). Do this to verify that COM isn't trying a different DLL. You might need to dig into the registry to see where else it might be. You might even have to (gasp) delete some keys from the registry. If all goes well, you should eventually get a "Class name not found" (or something like that) error. Then you know the COM references are cleaned out. Then re-register and try again.

-Peter