clutch pedal stuck all the way down...

[ehD]

just had this car for my 99 boxster in 3 days and on the fwy i was pushing down the clutch in 1st gear and the clutch just got stuck in its position all the way down. basically stuck in the fwy in los angeles middle lane blocking tons of cars on the 101 fwy. i could manually pry the clutch pedal up half way but the second it's a little pressed the clutch pedal will sink all the way in automatically. so i had to get aaa flatbed tow truck already and the car is in a parking lot now.

anyone have an idea of what could be wrong with the car? i can still start the engine, and i can switch between gears. so its as if the clutch is always pressed down... but it's not engaging i guess, i can't release it!

help!