NewGrounds API Object help

I found the thread in the NG TGF2 forum but it doesn't explain anything about how to use it, I copy paste my API ID and encryption key but I always get the same error.Here is the error output

"Loading configuration file C:\Program Files (x86)\Multimedia Fusion 2\Data\Runtime\Flash\Flex\frameworks\flex-config.xml
C:\Users\(User)\AppData\Local\Temp\FlaF72B.tmp\Ext ensions\CRunNewgroundsGlobalData.as(212): col: 39 Error: Access of possibly undefined property loaderInfo through a reference with static type Application:CRunApp.

API.connect(currentObject.rh.rhApp.loaderInfo, id, key);
^

C:\Users\(User)\AppData\Local\Temp\FlaF72B.tmp\Ext ensions\CRunFlashMenu.as(38): col: 21 Warning: variable 'cm' has no type declaration.

public static var cm = new ContextMenu();
^

C:\Users\(User)\AppData\Local\Temp\FlaF72B.tmp\Ext ensions\CRunFlashMenu.as(275): col: 8 Warning: variable 'item' has no type declaration.

var item = new ContextMenuItem(param0);
^

C:\Users\(User)\AppData\Local\Temp\FlaF72B.tmp\Ext ensions\CRunNewgrounds.as(100): col: 13 Error: Access of possibly undefined property object through a reference with static type Extensions:CExtStorage.

storage.object = global;
^

What does this mean?

Is there a tutorial anywhere on how to use this extension?