Outdoor Power Equipment and Small Engines - Cub Cadet hydrostatic clutch problem

Ok so its a 2130 model. The other model number is 13a-212f100. The problem started 2 days ago when I was mowing. I had just cleaned out the carb to get it running. When you start the mower in anything other than nuetral it automaticaly starts moving backwards. After finishing mowing I pushed the lever to go forward and it kept going backwards. After 3 tries it finally went forward. I went about 50 feet when it started leaking fluid out through the hydrostatic clutch vent hose. I shut it down and cleaned everything off. I checked the fluid and its full and clean. I started it back up and it starts going backwards and the brake wont stop it. I push to go forward at the clutch screechs and stalls the engine. It does this everytime now and will not move forward at all. Just a loud screech till the engine dies. I am looking for any ideas as to what the problem may be and what should or could be done to fix it. I havn't taken it apart yet. I've been an auto tech for 13 years so it shouldn't be a problem for me to do. Thanks in advance.

I'm not familiar with that type of drive system that cub cadet used, but from looking at the diagrams, I'd start looking at the area around #4 on this diagram....http://www.partstree.com/parts/?lc=cub_cadet&mn=2130+Tractor+S%2FN+239%2C001+-+326%2C005&dn=0037900007

If you don't see the probelm there, maybe at least the link I posted will help you some. Keep checking in, maybe someone else here has had experience with that drive system.