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Add Reference to PCDLRN.tlb not working

I'm need to do some VB.Net development on a pc that doesn't have PC-DMIS installed. My understanding is that I need to add a reference to PCDLRN.tlb but when I try that I get the following error:

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Microsoft Visual Studio Express 2012 for Windows Desktop
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A reference to 'C:\pcdlrn.tlb' could not be added. Please make sure that the file is accessible, and that it is a valid assembly or COM component.

I'm running VSE2012 on Windows 7 64bit. Any ideas what is going on here?

I can add reference to the same file in excel VBA on the pc with PC-DMIS installed without any issues.