How to use external DLLs in InDesign server plugin

Hi,

I am working on a project, which is having dependency on libxml2 library. I compiled the code on 64 bit Windows platform and using InDesign server 64 bit version. I put the required DLLs in Adobe InDesign CS6 Server x64 folder(with other DLLs). But now my plugin is not loading in server and also not throwing any error message on command prompt.

If I remove the libxml2's method call, then plugin is loading successfully.

Is there any other way to use external DLL or I am missing something?

Thanks & Regards,

Harsh