Using AT commands to secure a Bluno connection

I did a lot of reading today concerning secure bluetooth communications, and I feel the Bluno offers secure services with the following AT commands, however I am unable to pair to my device using the MAC address I provided via the AT command using the Arduino serial monitor. I tried on two different Bluno's and got the same results. It may be noted that I upgraded both devices to the latest Bluno firmware images of 1.9.4 provided by the Github repo. Also I tried pairing the Bluno's to an iPod Touch 5G, and I set the MAC address in the Bluno to that of the Bluetooth MAC address of the iPod Touch, and then I specified unique only connections, however I was unable to get my unique device to pair :/ Any help would be greatly appreciated.