Welcome to the forums and I'm sorry to hear you are having issues getting PTF to run. Unfortunately, without a little more information about your system setup, it is really difficult to give you any troubleshooting advice.
For starters, please read through the
Help Us Help You thread, where you will find general setup, optimization and troubleshooting topics.
If you are still having trouble after trying the suggestions in the above thread, please give us more information about your system and I'm sure someone can help get you going.