Chk that both mounting tabs are in place AND that the sliding bar that holds the hsg is slide all the way down.
You may need to remove the assemble before putting it back in correctly.
May need a little WD40.
added: when reinstalling the hsg, hold it in near the edges, then attempt to slide the bar to the locked position.
After that shake the unit a little to see if secured.
Last edited by Scrambler82; 03-19-2012 at 10:31 AM.
Reason: added: note / spl chk