I upgraded a NW5.1 server to NW6.5 and the license wouldn't take during the upgrade. Went to do it after, and iManager gives me this error when I try to install it:

Install failed: The licensing service cannot find NLS on another server. (c000400e, server = SERVER)

I haven't been able to find anything about this. Is this an issue with the upgrade? Or with the previous 5.1 licenses?