Doepfer

Hi there,
I just got a A-188 4096.  It delays really well and seems to do everything it should except 
when i apply a cv to the cv1 or cv2 inputs regardless of the position of the polarity switches 
there appears to be no change in the delay time.  All other sockets on the module seem to 
function as expected.  Am I missing something here or is my module faulty?  I've tried 
everything from a 0.5Hz sine wave to the output of a S/H but still nothing.  Any advice 
greatly appreciated.