Bluetooth network is unavailable error on PowerBook G4

I've got 2 PowerPC Macs, one is a 2005 Mac mini G4, the other is a 2002 PowerBook G4 Titanium. Both have Airport and Bluetooth cards installed and they work fine and both are OS X 10.5.8. The Mac mini's BT card is built-in Apple and the PB's BT card is 3Com's PCMCIA card and its drivers are [http://www.traud.de/bluetooth](http://www.traud.de/bluetooth) Because their Airport cards have limited range as they've got only one antenna, I've tried to connect to Internet over my Android 7 phone's 4.5G and Bluetooth and Bluetooth-Tethering. On Mac mini G4 I've managed to easily connect to the Internet using Bluetooth Network method but on PowerBook, I get **The Bluetooth network is unavailable** error  On the Console, a new line appears (shortened and simplified) [Req OpCode 1104 from: kernel_task (0) ... timeout: 10000] Bluetooth warning: An HCI Req timeout occured. When I try to send a file from Powerbook to Android 7 phone, using the send file option at the Bluetooh icon, I can easily send files. How to do a Bluetooth Network connection over this Android 7 phone?