But do we talk about the same thing, or you talk about the Wifi Key/password to access your network ?

Or you talk about when you access the IP address of your box ?

Try to reflash the box with Bad Sector Recovery and the clean image, as it could have been corrupted. I seen such type of problem (of failure to login to the box with SSH/Telnet) only when the box had an image that was corrupted. A new Flash of clean image should fix the issue, also be sure you have enough Flash space left. Min 1 Mb must be left in the box to have it running smoothly.

Admin