A short term quick answer is to get your property back on the right track with good property management. Personally, I am not familiar with Pottstown at all, but a quick Google search tells me that it is in the Philadelphia area. That being said, a major market like Philly should have all kinds of property management companies there. Units sitting vacant for 2 months is ridiculous. Either the management is sitting on their butts doing nothing or the units are priced wrong.
Secondly, a good management company will deal with the day to day operations for you (notices, tenant issues, etc.) which leaves you to sit back and look at the numbers more carefully and determine what your goals are with this property.
My quick advice is to fly there for 2 or 3 days and line up meetings with at least 6 different management companies before hand. Any quality company should welcome the meeting in their office to propose to you what they can do for you. Also, don't be afraid to demand an update every other day on the vacant units from your current manager or the new one you find (where are the units advertised, how many calls today, how many showings).
As you can tell, I am a huge proponent of good management. I think when an owner worries less about the little stuff you can focus more easily on the numbers and big picture.