ART Rig Rotations don't go spline

Sorry if this has been answered somewhere else, but I couldn’t find anything on it other than this thread, not to mention that I am just starting to learn most of this. The only thing I want to know is how to unlock the rotation tool for elbows. As of now it is greyed out, and when I go into the settings to move it from the locked list, I get an error stating “Autodesk/Maya2014/scripts/others/PScreateLockingUI.mel line 326: setAttr: The attribute ‘Manney_2:ik_elbow_l_anim.rotateX’ is from a referenced file, and cannot be unlocked. //” I have tried the method mentioned above, but to no avail, nothing. Is this locked feature implemented for reason, or am i just missing something? Thank you in advance.