Network user name updating issue

[mysat-bs]

My Due2 runs Blackhole ver 3.0.3 before and just updated to ver 3.0.3c. The new image is excellent, but after I flashed the image from previous blackhole 3.0.0 to 3.0.3, my receiver's user name and password can NOT update. No mater how I change the user name and password from my remote control and reboot the receiver, the receiver seems cannot update my change. (the receiver shows updated username and password) but I can still access my receiver using my old username and password from my PC. I did copy some setting to the receiver after basic configure after this copy I reset the username and password.

What is wrong? How to fix it?

PS: After update to 3.0.3c, the problem is unchanged.