I bought a brand new MKII Express on amazon, factory sealed, and plugged it into my Spider III 75 and it doesn't seem to be working. I tried calibrating it, and i got the 1, 2, 3, and 4 on the LED screen when i went through each of the steps, then pressed D to accept.  Then when i turn the amp off and back on, none of the buttons work, the vol/wah pedal doesn't work and none of the LED lights are on except for the blinking tempo light, that's it.  I am getting very frustrated and have been searching for hours for answers. 

I even tried upgrading to the latest softward, and did so successfully, and the MKII Express still doesn't work with my amp.  Someone help me out please.  What else do I need to do to get this thing to work? I spend a lot of money on this item and not getting any benefit from it whatsoever other than losing hours of my life researching this online. HELP!