Nortel 1120e UNISTIM

I am new to this forum. I recently installed asterisk 1.6 which comes with a unistim driver. I was able to get old i2004 phones and avaya 2050 softphones to work with the UNISTIM driver. But we recently got 1120e phones and the phones are not able to register with asterisk. I keep getting “Sorry phones not configured in unistim.conf” The MAC address for the 1120e phones has been added in the unistim.conf. Any help will be appreciated thanx.

Thank you