Vista - Sharing an email account between admin and standard users

Apparently, I posted this is the wrong section previously so I'll try it here in the general section ...

Data Migration for Vista Compatibility issue:

I built a new system and installed Vista x64 Ultimate and so far, so good. This web site has helped me tweak this thing amazingly. So far, I'm very happy with Vista x64. It's nice to have a Core 2 Quad processor, a 64-bit OS and 8GB of RAM. Schweeeeet!

I did run into one problem. I have an 80GB HD just for Vista. All my programs have been installed on another HD (a 640DB drive). I installed all programs from the admin account and so far, have been able to run them from my standard account except my email client.

I installed my email client in D:\Internet\PocoMail4

When I try to run it from my standard account, I am being asked if I want to migrate the date to a new location (it's somewhere in the \User account. Not wanting to put that much data on my C:\ drive, is there a way around this?

So far I have given full control to the standard account for D:\Internet\PocoMail4.
I have also set up sharing for \\PCName\PocoMail4.

I can use the email client from my admin account with no problems so why would the standard account tell me that there is a compatibility problem using the D:\Internet\PocoMail4 directory?

What else can I try?

Best regards,
Jim