Error signing 64 bit application after adding VERSIONINFO

I have both 32 and 64 bits applications based on Eclipse and I am looking to add VERSIONINFO resources to the EXE with Resource Hacker and then sign the files.

It works fine for 32 bit but on 64 bit I get an error signing after adding the resource: SignTool Error: SignedCode::Sign returned error: 0x800700C1 %1 is not a valid Win32 application.

Are there any special considerations when adding RC/RES to a 64 bit application, searched and couldn't find anything. Before signing the version detail look fine from within Windows Explorer.