Can't Update Firmware To 2.1.1

I have DSPMIXFX installed on my ipad4 and everything works fine with Cubasis, however when I try to use DSPMixFX it will not recognize the UR44, it stays off line with the blinking adapter image in the top right corner. The firmware is 1.1 but I can’t seem to update it, I’ve tried on my mac but it doesn’t detect a UR44. The firmware updater won’t launch. Any ideas??