I'm trying to convert Sprint 650 to Verizon and i've made the serial cable etc... when using bitpim i'm getting following error..

CommsWrongPort: Other CDMA Phone: The port you are using is echoing data back, and is not valid for Brew data. Most likely you have selected the modem interface when you should be using the diagnostic interface.

I've tried various things... such as:

setting different comp port.. that not being used by any other app...
setting the correct speed @ 115200...
enabeling the serial connection in bios..
phone pass through enabled...
setting the Phone to custom transfer n forcing serial connection ... etc.

tried it all combinations and on few different computer....

not having any luck... i've searched and noticed few guys had similer issue but they never posted on how they got it resolved.. Can Anyone help!!!! i'm about shoot my self trying to get this work and not getting anywhere.... thanks in advance for you help...