Motorola

I want to download ringtones to my phone, and I'm trying to establish a connection between my V551 and my desktop (running Win XP Pro SP1), using a Linksys Bluetooth USB Adapter (USBBT100). I can get the devices to pair just fine, but when I go to My Bluetooth Places on my PC and click on OBEX File Transfer, I get an "Error establishing connection" message, and can't see the folders on my phone. I know the phone and PC are at least talking to each other... on the phone, I changed the Access option (under Device Details for my Desktop entry) to "Ask" instead of "Automatic", then when I try to open the folder on my PC as mentioned above, the phone asks "Desktop requests OBEX Transfer", to which I must select Grant or Deny, so I know the phone is seeing the request from the PC, but still the connection never gets established. Any help???