briguyy,
I had the same problem with the USB connection to my PC. It called it a removable disk and asked you to insert a disk. I tried everything to no avail. I was running EA28 stock, but DL09 did the same thing. I kept waiting for Verizon and Samsung to put out the promised update. Oh, and I too am running Windows 7 Ultimate 64 bit.
I finally got tired of waiting and flashed my phone to Superclean 2.6. Problem solved. But then I wanted my Samsung widgets back (superclean removed them) so I flashed again to the Froyo 2.2 stock EB01 and I am happy with this. Since I am now rooted I was able to disable the Verizon bloatware but still keep the Samsung widgets.
Yes, I was very hesitant about flashing for the first time. But I read up on it first, asked some questions, and followed the instructions exactly and it went perfectly. I didn't hesitate at all the second time (smile).
I don't know if you are willing to flash or not but it will cure the problem.