Prosport stall problem

[srreck]

Hi there,
I'm experiencing stalling problems with my Prosport. Because I race mostly in hillclimbing this is a big trouble because when the light comes to green, you put the engine at 6000 to start.....and CLONCK the transponder detects the car and the chrono doesn´t await. I have notice that the clutch has a good travel but it engage the 100% at the end of the travel and then.....CLONCK ! stall again. Anybody has an idea?
Thanks