I get nothing out of the amp when I try to hook up my wah and distortion in series.I suspect this is due to an impedence mismatch between the two, hindering max power transfer. I don't know much about combining effects. Do you have any suggestions for solving this problem?
Thanks a lot.

I think you have something wrong connected.Check all your wires, your power supply etc and be careful to place the pedals correct...

I used to make the mistake all the time before I marked ins and outs...
 Make sure you're going Guitar>efkt IN>efkt OUT>Efkt IN> Efkt OUt > Amp in..
 I would test them one at a time to see if one has a problem.

if you had impedance mismatching you'd probably get a signal, unless you actually grounded the signal path It might sound wierd and gatey though. What are you putting first?

Are they both battery powered, or running from power supplies? There could be a problem if the grounds are at different levels (e.g. one split power supply, the other not).