I have a M7324 set that currently has 1 CAP installed. I went to install a second cap (Per the 6.0 manual you can have up to 5 total per system but only 2 per M7324) When I plug the line cord with 24v on pins 2&5 and the Phone port on pins 3&4 the first cap in the series comes up and the phone comes up but the second cap (middle device) does nothing, no lights, NOTHING. I verified that both Caps work as a 1 cap configuration. The manual only briefly mentions that you can use 2 caps but show nothing further. Any ideas?