MC9090 28 Key Keypad Not Recognized

1) Time/Date 12:45 / 07/12/2011
2) Response time
3) Product MC9090 RFID
4) OS Version WM61
5) Clarify Case # 2413038

1101900506877 - MC9090-GU0HJEQZ1US - TERM:RFID,SFH,1D,CLR,64/128,53,WM6.1,US* - SO# - 7000921849 - Ship Date - 06/21/2011

MAJOR SALES OPPORTUNITY in jeopardy.

Customer purchased 15 MC9090-GU0HJEQZ1US (53 keypads) and
15 (28 key keypads - 21-79678-01) .

customer stated that when swapped out keypads keys worked but only some of them .. still mapped to 53 key keypad.. not the 28 keypad ...
verified in start > setting> system >systeminfo > config tab .. .still states 53 keypad.
verified the customer cold booted the device after swapping out keypads, customer also clean and blanked the device to no avail.

I was able to duplicate issue here on my device using 28 keypad and a 43 keypad
Does the RFID devices support swapping out keypads?
verified the RMT, SCT files are on the device.