You need to open up another rfcomm channel. Take a look at this
FAQ, where a second serial connection is established over rfcomm1.
From: Peter Vandrish
Sent: Thursday, March 26, 2009 7:55 PM
To: General mailing list for gumstix users.
Subject: [Gumstix-users] RFCOMM Help!
I am trying to use a Basix to connect to a verdex over bluetooth, that works,
and I can also connect to a sensor board over bluetooth. With those 2
connections established, the Basix can no longer receive an incoming connection
to rfcomm0. Can anyone help me?