I have wiped desktop software from my PC AND Laptop and STILL am unable to add any third party apps to my pearl or 8700g.

I am on a BES and have e-mail sent from a BIS as well.

I continue to get an error message that states that no applications designed for my device were found.
I even re-installed windows.
The last app I have added was Wayfinder which was about 3 weeks ago-I have loaded many applications on other berrys in the past with not even a single problem.
Anyone can help???