Retrieving the COM class factory for component with CLSID {D904E89F-5FF8-11D6-8A50-0040CA1586FA} failed due to the following error: 80040154.

I have a dll which convert the password into a set of string... While i run in my desktop application it runs perfectly but when i run in my new laptop i am getting error as Retrieving the COM class factory for component with CLSID {D904E89F-5FF8-11D6-8A50-0040CA1586FA} failed due to the following error: 80040154, while creating its object.. Also i use this dll in Vb 6 0 Application ... I get Error here as ActiveX cant create the object .. Please Help on this.. Some said that i have to change the Platform to X86 from any cpu.. I did so but no use.. ...