why my laptop with fedora 8 cannot be discoverred?

List,

I have a USB dongle with CSR chip. 
"iscan enable;pscan enable" are in hcid.conf.
It can send file to my cell phone using gnome-obex-send.
even l2ping to my cell phone returns 0 bytes.

It can discover my cell phone and other BT devices.
But my cell phone could not discover my USB dongle.

I add discovto 0 in hcid.conf and mode discoverable in /var/lib/.../config. Both are not help.

Any clue?

Thanks.

---henry


      

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