WinPE X64 & PCanywhere

I had modified my x86 WinPE to include PCanywhere and bginfo which works fine. I created an x64 Winpe it doesn't work. When I try to run it manually in WinPE i get the error "The subsystem needed to support the image type is not supported" - how can I get the 64bit PCanywhere files required for this environemnt?

Thanks