camera problem

I've edited a camera of a new track,but in some track sectors,the cars could not be show!In fact,the cars were still moving,when them driving after the wrong sectors,them could be show as usual.

Does anybody know?Here is the track.
[files.filefront.com]

I gave it a try, but I'm still enable to fix this.
I wonder if track camera count is not set somewhere in the exe...I don't know.

I`ve downloaded the Track,i`ll take a look at the Cameras for you,i`ve had this happen before when i`ve made track cameras for other guys.

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