Please help, i'm new in the blackberry world and I tried to change the software from verizon to iusacell. I have the desktop manager 5.0 and i downloaded the pack: 8330EFS_PBr4.3.0_rel199_PL3.1.0.71_A4.3.0.124_Fast 100 from blackberry, then installed on my pc, then I erase the vendor.xml file and launch the desktop manager and the manager don't find my blackberry. I try too erasing the RIMDeviceManager folder before to use the device manager from the pack and neither find my blackberry. Please what I'm doing wrong.