bluetooth serial port service doesn't work

Ubuntu 8.04

I use the python bluetooth console that comes with the py60 distribution in order to connect to my computer.

In order to do so, I create a serial port on my computer using /etc/bluetooth/rfcomm.conf

rfcomm0 {
 # Automatically bind the device at startup
 bind no;

 # Bluetooth address of the device
 device 00:19:79:86:C3:00;

 # RFCOMM channel for the connection
 channel 2;

 # Description of the connection
 comment "Daniel";
}

then I start listening on this port:

sudo rfcomm listen rfcomm0 2

then in another console window I annouce my serial service

sudo sdptool add --channel=2 SP

but my phone keeps saying: no serial port detected.

this used to work before I upgraded to the latest ubuntu 8.04 version.

I tried using a different bluetooth card and a different computer but it did not help.

lsusb output:
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 005: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 001 Device 001: ID 0000:0000

dmesg ouput:
[ 5288.008063] usb 1-1: new full speed USB device using uhci_hcd and address 6
[ 5288.344523] usb 1-1: configuration #1 chosen from 1 choice