Try adding more refridgerant,both pressures are low.If the exp valve is stuck open your low side pressure would be higher I would think.If you have a obstruction in the dryer the tube should feel cooler after the dryer and I would expect the high side pressure to read higher.I would try adding another pound and see what your gauges read.should be 150-175 on high side and 30-40 on low side.Good luck.