Thanks for the prompt response. I have in fact retyped credentials several times to no avail. As I said the other ones work fine. There is one thing to note.
Yesterday I removed them from AMP, re-added them, on of the devices was actually able to fetch the config. Two others were not. Then this morning I came in and now the first one is reading the error.
I guess the other thing to note is that these devices are 250 ms away from the server. I increased the timeouts accordingly but the error keeps coming back. These devices response when logging in is as follows:
INHYD-AP02>en
Password:
INHYD-AP02#
All other AP's in the environment follow the same standards.