Cant choose armor with advanced armor training armor specilization chosen.

[Sir MADMIKE]

I'm creating a fighter hes at level 10. I have chosen as and extra feat advanced armor training. After choosing armor specialization which at this level would give me +2 to my ac based on my fighter level; and clicking on the drop down menu to select the armor to use with the feat it says no options available. I even tried taking armor focus to see if that would help and it still shows no option available. I do have the armor equipped to my character. Is this a glitch, am I doing something wrong, can anyone help me out here.