Definitely put some regular Gammies on there. That'll probably help quite a bit. If it still wants to dive, then you got yourself a sub- surface Slammer. I can get one of my Slammers to dive down to around 4ft and it's my favorite plug. I have well over 50 fish on it, including a 10 and several 7-8lbers. All of the bigger fish were caught on the sub-surface retrieve. I don't know why, but they just like it like that around here.

Of course there's always times when the fish like it on top too. In that case, i'd keep the one you have and get another one and chances are that it'll be more bouyant. With those two baits, you'd have a deadly combination!

edit-Oops brian beat me to the punch, but yeah... what he said:)