The BB Connect apps from the xda-developers site work fine on my 8525. I followed the instructions and everything worked fine.
Did you read through the included instructions, specifically for BES use? Herexxx8217;s one last attempt to help you get this working. You may want to read through this a couple of times before you start.
Disconnect your phone from your PC. Remove all Vodaphone apps and perform a hard reset. Get the 8525 back to the as-received state. Remove all Vodaphone apps from your PC.
Install the BlackBerry Connect Desktop for Windows Mobile on your PC.
Install the BB Connect app from the xda-developer site on your 8525 via active sync. I installed mine to main memory. Disconnect the 8525. Turn on the phone. Make sure you have at least 2 bars of signal.
On the 8525 tap Start>Settings>System>BlackBerry. The BlackBerry Connect settings app should be displayed. Tap the PIM tab and select the Calendar check box. Once completed, reconnect the 8525 to your PC.
Your PC needs to be connected to your Exchange Server. Mine was set up while connected to my work Microsoft Exchange Server via VPN.
Once the 8525 is reconnected to your PC and your PC is connected to your Exchange Server, launch BlackBerry Connect Desktop for Windows Mobile on your PC.
Click the Advanced tab.
Verify that the Email field displays your e-mail address.
Click the General tab.
Click Connect. Your 8525 should now be connected.
Follow the on-screen instructions to generate the encryption key.
A PIN should now appear on the 8525 (make sure the Identity tab is displayed).
Once the PIN is displayed you can go to
www.cingular.com/blackberrystart from your PC, log in and select the change handheld option. Input the new IMEI and the PIN from the 8525. Also send the service books. You should receive a message notification each time the Service Books are received on the 8525. If everything is working you will also receive a message on the 8525 that it registered on the network.
Read the BlackBerry Connect for Pocket PC User Guide for guidance and tips.
Good luck.