PDF Filter11 for 64 bit OS is not working

Hello,

We are trying to upgrade to PDF Filter11 on 64 bit OS (Windows 2008 R2 & WIndows 7 - 64 bit).

Although the setup is successful, LoadFilter is returning exception:

    hr = E_FAIL

     GetIFilter Code: 0x80004005

Snapshot of the code:

IFilter *pIFilter=NULL;

HRESULT hr=LoadIFilter( "c:\\some.pdf", NULL, (void**)&pIFilter );

  if( !SUCCEEDED(hr) )

  {

     //Raise Exception

  }

Please let us know if anyone has come across the issue and any resolutions.

Regards,

Pushpraj