I've had a couple of CD's stick in my ST as well... but they were burned CD's with a paper label attached to them (I gave my wife an earful after she put those d*mn things in the third time).
On the face of my deck (I will assume yours is likely the same), there is a "dust guard" at the area where you feed the CD - use a small screwdriver to hold open the dust guard, and the CD should come out.