My 7510 blackberry all of a sudden stopped to charge the battery and the indicator stopped to appear. I was almost 100% sure that the battery was bad, so I bought a new one. The same problem continued. I thought that maybe it was a software problem cause lately the blackberry sofware was slow and crashing. With all of this going on, I could intellisync with my computer (the computer could detect the blackberry). I decided to install again the blackberry software hopping that everything would be ok. Now:
* The blackberry has the error 507
* The computer recognizes the blackberry. When it is Uploading the BB software everything goes fine until the step 2 "wait for handheld system initialization" starts. The blackberry screen shows again the 507 error and then when the step 3 "Load the radio software" finishes another screen appears on my computer monitor saying:

Unable to complete the loading operation
"A fatal error has occurred while updating your handheld's software. Please try again.Device communications error encountered. [P:0x0000000E]"


I've tried to remove the desktop manager as well the handheld software and reinstall again with both versions 3.7 and 4.0. The program does the same thing.
I also tried to delete the vendor.xlm file and nothing happens.
What should I do?