I put my new boom together last weekend and tried it out on the job yesterday. I like it , but I have a problem. The heavy cord that goes from the CT22 to the boom won't work on the auto setting. If I plug the tool directly into the vac it works fine. If I take the heavy short cord and plug it into an outlet with the tool connected, it works fine, but when I attach it as intended to the vac it doesn't work. ??? I don't get it. Am I missing something obvious?