.net - Retrieving the COM class factory for component with CLSID {XXXX} failed due to the following error: 80040154 -

I used to create a PDF report in C #. Using the Net, Windows has developed the service. To create a PDF file, I am using a third-party DLL application running in my Windows XP platform when I installed the service in the 64 bit version, I found this error:

The following reason failed to recover the COM class factory for the component of CLSID {46521B1F-0A5B-4871-A4C2-FD5C9276F4C6} error: 80040154.

I have registered DLL using the regsvr32 command. I am able to see this CLSID in the Registry. But the problem persists.

What could be the problem?

in VS - project properties - in build tab - platform target = X86