Help with video clips

[HC-Majick]

thanks sparky...but why would it play all the way thru the second time?
these particular clips were taken from a longer wmv, and cropped and converted to mpg using sorenson video suite. But it seems to happen with clips I haven't touched (although obviously I can't say how they were edited prior to me using them).

Thanks all, I appreciate everyones imput.
I guess i'll just add the extra clip to be on the safe side.