For bigger cameras like that the $14 stabilizer (steadicam is a whole different ballpark) doesn't work all that well. Actually, it doesn't work all that well for small cameras as well.
You want to look into several different options:
-- a sled and gimbal system
-- a home-made Fig Rig (google it and you'll find stuff about it)
-- steadicam system (these are hard to make or expensive to buy, so might be a last resort)
-- track and dolly system (cheap to make, though curved track can be difficult)
With a camera like that, I thought it was shoulder mounted, so that should help you stabilize from the start. The dolly or steadicam systems are best for a really dead stable camera movement, but take time to set up and operate.