BB Curve 8350i :: Trying To Reload Software?

I have tried everyting and it does the sam thing everytime at the same time. When the app loader goes to " load jvm and system sofware" the phone goes from white 507 screen to black my computer makes the disconnect sound and then it always sits and the app loader just does its process and then everytime it says device communication error A:0x0000000F > then the phone boots back up and says the same 507 messege.? Its like the usb is turning it off right when the app loader tries the download sequence. it does the same thing at the same time no matter what> i have tried wiping with bbsak and reloading but same thing happens ? I have even went to usb power options and nothing . tried to reinstall usb drivers and tried again > restarted comp nothing> And its not rebooting over and over the app loader actually recognizes the pin everytime i connect it > so its not a problem with seeing the device. I have done it over and over and same thing happens.>>> Its screen goes black thge red led comes on for 3 nseconds and then it sits there black and the app loader never gets past the "load jvm and system software" step. It then goes back to the white screen and app loader says the error communicating A:0x0000000F everytime> Does anyone have this happen? Any tips? I need serious help > I have read all the 101 lecture on a nuked berry and its states that the berry is in a constant reboot sequence which mine isnt doing> It akll work like its supposed to until I hit the finish button on the app loader> Right when I do the phone acts like it gets disconnected from the comp when its still connected> I am trying to update to .313 on a b.b 8350i with boost> I even tried to delete the vendor xml file in app loader and still doing the same thing> I know it would work if the damn phone wouldnt disconnect by itself > If anyone will please help if they have any suggestions thanks alot>