Old school Baracuda not sticking to pool floors?

Hey guys, been awhile since I've been on here.. I've resurrected our old Baracuda (white body.. Must be early 90's I would think) from the dead.. While it does get around the pool and sucks up debris, it does so while 'hovering' about an inch from the floor (So it seems from my vantage point).. Any ideas what would cause this? Could it be weights (I only have 1 weight, about the middle of the first hose), or is it due to the bottom round flap thing (Whatever you want to call that).. Thanks!