HELP! Cannot install any programs to Sprint PPC6700

[lorlong]

I have a Sprint PPC6700. I have Activesync 4.5. It will connect and sync with outlook and I am able to sync and browse my device. If I try to install ANY programs I get message that "Windows CE Setup Files - Application Manager cannot install this application on your mobile device due to an error in the setup file. Reinstall and try again." I've tried games, microsoft money, etc and not one single program will install. I've done a hard reset on my PPC. If I move the files to my laptop, it will install them. I am guessing at this point that something is on my desktop that is preventing it.

I am new to this so any help on where to begin would be much appreciated. After much searching, I have noticed that AKU are updates that might be needed. I have Windows Mobile 5.0 (Build 14847.2.0.0).

Thanks!