I guess to start off we will need to know the following information:
- Computer specs
- Type of add-on scenery
- What type and how much AI traffic are you running
- What are your settings for FS9
Once we know the answers to these questions, then we can go further. I ask this because a low end computer system running FS9 with settings maxed out and a lot of terrain will cause freezing or lagging at times. I have seen this also when approaching an add-on airport with a lot of scenery to load.
"Oh I have slipped the surly bonds of Earth...Put out my hand and touched the face of God"