1996 Volkswagen Jetta AC Blows Hot Air

Air Conditioning problem
1996 Volkswagen Jetta 4 cyl Front Wheel Drive Manual

I've done some research and troubleshooting on this and here is what I have so far. I need some help on this from people who have been here before. When the AC is turned on I hear the compressor engage and the motor bogs down a bit so can tell the compressor is turning on. However no matter what blower speed I choose the air blows as hot as it is outside. I checked the voltage on the compressor clutch when the AC is turned on. It never shuts off, so the pressure switch and ambient temperature switch do not seem to be a problem. The compressor always stays engaged. The tubing around the service valves do not seem to get cold or hot either.

I bought a manifold set and took some readings:
Outside temp 94 degrees.

Engine Off (for hours)
High Side: 140 psi
Low Side: greater than 120 psi, over what the guage could read.

Engine On, AC OFF
High Side: 140 psi
Low Side: greater than 120 psi

Engine On, AC On
High Side: 135 psi
Low Side: 67 psi

Engine Off (5 minutes)
High Side: 135 psi
Low Side: 120 psi and rising

Engine On, AC On
High Side: 140 psi
Low Side: 67 psi

Engine Off, AC Off (10 minutes)
High Side: 150 psi
Low Side: 80 psi and slowly rising

Also you should note before going into the in depth analysis I did the simple thing and bought a can of refrigerant from Walmart and emptied the can into the system a couple of months ago. Obviously nothing changed and today I decided to go into further troubleshooting. Can someone tell just by looking at these results what's going on?

Thanks.