Help me, please ... I'm new with Bluetooth tecnology

Hi everybody! I'm new in Bluetooth tecnology and I'm lost with one problem ... can somebody help me, please?
I have to change a program implemented in Java and Bluetooth. The problem is that I'm new in both tecnologies ... This program runs on a computers with Linux Debian OS. This program uses 3 bluetooth dongles connected in this computer. The first dongle keeping doing Inquiry to find devices (phones). The second dongle must stay alert to receive Bluetooth messages (files). The problem is that the dongle that is staying alert is the first dongle, that is also doing the inquiry. Since the Inquiry service blocks the others services, I don't have any dongle staying alert to be detected...
Researching a little, I found out that the method to do a dongle stay alert to receive messages is the DiscoveryListener (am I right?). So, I have to configure the DiscoveryListener to uses the second dongle, not the first. The problem is that I didn't see anywhere in the java program where to configure which dongle must be used with DiscoveryListener. Is the program who chooses the dongle or is the bluetooth library? Is it default or can I change the configuration ?
Thank you in advance !! I'm lost here ...
F�bio
Sorry about my bad English.

discovery listener is called in d program....so modify the code

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it's hard to read. please use code tag.
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