Pressure not building up?

[grosh]

We did not get our robot wired until the last minute so we only got about an hour to test our pneumatic system. Now the robot has shipped...HELP!

The compressor kicked on and, when we plugged the hose running into the working side of the system, it would fill the system with 120psi. However, when the hose was connected to a 6 SMC solenoid manifold the air ran out the exhaust ports. No pressure would build up at all.

Specifics:
-We are using three 3/4" double acting cylinders to pull back our kicker.
-We are running 2 solenoids per cylinder to increase the exhaust volume. 6 SMC solenoids (4 x 24v & 2 x 12v)


We have never used a manifold before. Could we have issues with the manifold?

The pressure never built up on the working side. Doesn't their have to be a minimum amount of pressure for the solenoid to set themselves? If true, how do we overcome this?

We had to use two solenoid breakouts because we needed 12 connections for our 6 solenoids. Is it an issue to combine 12v and 24v?

Thanks for your help! We don't have our robot to test with so we are relying on the graciousness of the chief delphi community to help us before our regional.