Hi, I've just been given a Hitachi 32LD7200 TV. I positioned the TV onto its stand correctly, but it wobbled so much it nearly fell off! It looks like it needs to be screwed onto the horizontal metal bar running across the rear base of the TV, but I need to be sure, and need to know what screws/bolts it needs (we're talking about a lot of weight here). There is no reference at all to fixing the TV securely onto its stand in the instructions manual, only about the power swivel function. Please help!