[3DSMAX7] Problems with camera tracking...!

[traBBit]

I recorded a small videoclip outside my house. Now I want to add some 3d-stuff to it. I've followed the tutorial which comes with 3DSMAX, and it works otherwise but:

My scene is 350 frames long. I've added 3 CamPoints for the frames 90-110, and also added 3 trackers for those CamPoints. Whenever I run the the Tracking Status with settings (Match error: 0,5; Variance delta: 0,5; Jump delta: 9,5) I got no errors at all. But when I add a normal free-camera to the scene and make it the "matchcam" and then click the "MAtch Move" button I get MANY errors. Now why's that? Shouldnt there be no errors at all coz after all there were no errors in the tracking points?


And if you could answer these questions aswell:

1: When I add a Motion Tracker for a CamPoint, how do I have to position the tracker? Does it have to be *exactly* in the same place as the campoint? And when ever I move the tracker is it supposed to be so that those campoints move aswell...?

2: Do you know any good tutorials where I could find some help with this...? :/

*3: Do I have to make a CamPoint/Tracker for every single frame in the scene to make this thing work correctly? (The reason I made the motion tracking only for frames 90-110 is because i just wanted to test the system: didnt work)


Help me please


EDIT:
So when I click the "Match Move" button i get this error: "Errors too large at frame 96. Continue matching?" and then there is some text between the "Match Move" and "Show Errors" button which says "Max. pixel error: 1.#INF at 96".