Dodge Intrepid A/C Problem Help?

I have a 1994 Dodge Intrepid 3.3l Automatic that blows warm air. I replaced the compressor and drier last year only to find out an A/C line was damaged. I just replaced the line and added 2 3/4 cans of r134a however the ac clutch dos not engage. I checked the relay for voltage and tested relay (good) when put a jumper wire across the relay a/c clutch will engage so I know its good and it will blow cold air. I checkled the pressure on the low side at 25psi. Anyone have any Ideas why the a/c clutch will not engage by itself or any other parts I can test.
 
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