I have a UC520 that does not upgrade CUE. I am trying to upgrade to 8.2.0. When usine CCA, I was able to upgrade CME IOS but it failed on the CUE. I tried upgrading CUE on it's own and it failed as well. I now tried upgrading using boot helper command, it starts to copy the file from the TFTP server and then then it aborts? I am thinking a space issue? I don't know.