AutoCad 2014 - CUI Loading Issue

We use an older Mnu/Mns menu system from an older CAD version. We have very little time to devote to modifying and updating it to the newer CUI. Yesterday I had the Mns loaded into Cad 2014, and everything worked fine. All the commands worked pathing is correct and so forth.

Now all of the sudden I get Unknown Commands on everything. Nothing was changed. I have reloaded the Mns, Cui, double checked my support file pathing and everything. But it tells me this for example.

Command: (LAYER-N "Lin01" 7)(ACLOAD "LISPS" "2LDER")(PRINC) no function definition: LAYER-N
Command: Unknown command "2LDER". Press F1 for help.

12 hrs ago, this command was working perfectly. I was having the same issue with 2013 as well. If anyone could please help, it is greatly appreciated.

Thanks