connect to /dev/rfcomm0 via screen fails

I am trying to connect to an HC-06 bluetooth serial port.

I've set up my /etc/bluetooth/rfcomm.conf with the appropriate (bluetooth) MAC address and set "bind no".

To get the device connected, I run:

Code:

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bluetooth-agent <PIN> &

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where <PIN> is the pin I've set up for the device.

Then I run:

Code:

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rfcomm bind rfcomm0

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If I then try to connect using screen:

Code:

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screen /dev/rfcomm0

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it sometimes connects without complaint, but often will complain:

Code:

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Cannot open line '/dev/rfcomm0' for R/W: open() blocked, aborted.
Sorry, could not find a PTY.

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If I use minicom to connect, it doesn't normally complain. I've also found that if I connect via minicom first, then usually connecting via screen will work after that. Does anyone have any ideas on what the issue is?

James