help cai questions

I just got a aem cai w/bypass valve, i have two problems, first i cant get my bypass valve to fit on the air filter tubing, it fits fine on the main inlet area. Secondly, after messing with the bypass and not getting it to work i decided just to install the normal way, but anyways i started the car after checking that everything proper and hear the beautiful sound of the cai, drove a little while and turned off car, restarted and suddenly NO SOUND, i cant hear the noise anymore and i have noticed a slight loss in power. What could the problem be?????

Please help me.
thank you all