ClickOnce SLOW load on 64-bit vs 32-bit Processor

I've developed a Windows Forms application using VB.Net VS 2013 and published it using ClickOnce. The compile Target CPU = AnyCPU.

My problem is with the form load time if I run the app on a 64-bit processor vs. a 32-bit processor. The 32-bit machine loads instantly. The 64-bit takes close to 50 seconds (Truth!).

If I change the compile Target CPU = x86, it loads instantly on both machines. I double-checked all references to be sure that all DLLs were also compiled as Target CPU = AnyCPU, and they are.

How can I figure out why the form load is so slow on the 64-bit machine? There are close to 150 controls on the form.

Thanks for any assistance,

KIMCD