In our forums, a user reported having this problem:
"Because I have an x64 OS and use IE7 x64, I can't download Adobe Flash Player. The Adobe Flash Player site says:
To use Flash Player to view Flash content on a 64-bit operating system, you must run a 32-bit browser."
Here's how to get Adobe Flash Player working with Internet Explorer 7 x64.

First go to Add/Remove Programs and uninstall IE7 x64.

Then, go to the Adobe web site and download the Flash Player. Make sure you have ActiveX installed as well.

After installing Flash Player, reboot and re-install IE7 x64 - IE7-WindowsXP-x64-enu or IE7-WindowsServer2003-x64-enu, depending on your operating system.

That should get it working. Thank you to Denise_M who figured out the fix in our forums!