PPCGeeks - error upgrading

I have successfully upgrade my xv6700 with Helmi's wm6 and upgrade the radio to 1.41. but I noticed then that I cannot use the bluetooth, so I flashed it back with the original rom from verizon. But in the middle it lost its usb connection, and went to a black screen with usb text on it. Then I was trying to flash it back with helmi's apache wm6 again but there was error 120. I brought it to my friend and he managed to flash it with Helmis's apache wm6 but there is no radio version. so I simply could not use the telephony function at all. Until now, I cannot make it right. I'm trying using the verizon rom, but it said that there is no connection, when I am trying to flash it using helmi's wm6 it said error 120. What should I do?

Ming