SM not upgrading with CNUT

I have 1 SM on my network that will not upgrade to 6.1, all others have worked fine. Here are some stats on it:

Current Version: 4.2.3, with boot 3.0 and FPGA 071904

RSSI - 750
Jitter - 4-7

All others on this AP have taken the upgrade fine, using the tool with auto-update feature. Also noticed in the logs that it tried to do the upgrade, or at least detected the auto-update session from the AP. Have tried to update it several times, to no avail. Anyone have any suggestions on this??

Also, noticed that several of my SMs show a fpga of 111504 instead of 051104, anyone seen this on their network?