Multitech Conduit acces problem after migrating to mLinux

Recently I was following the tutorial but after trying to migrate from AEP to mLinux I am not able to access on it anymore.
I can not access by SSH or GUI.

I have a Multitech Conduit MTTCDTIP-L4E1-266A.

Is there any solution go back to previous firmwware? I had AEP 1.5.2