What makes you think that you must have a 64bit Link version? I run Win7x64 and the existing Link version runs just fine...though I admit not needing to do what you are attempting (I instead am using OTA sync with Outlook.com for my calendar and contacts).
So, please clarify...for I suspect what is wrong in your situation is not rooted in the need for a 64bit Link version.
Occam's Razor nearly always applies when troubleshooting technology issues!
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