#2109 error! help needed urgently!

hello there every one. i’ve got a problem with error #2109 in flash cs4 i’m working on a project and it has 3 different scenes, i’ve got 7 buttons in each which skip through timeline of their own scene. so when I test each scene seperately it works just fine but when i test the whole movie i get the error and it says that it can’t find the labels that each button refers to. i’ve checked the labels 1000s of times and there are no problems with that… i’ve googled it and found nothing… i don’t know maybe it’s just some program bug, but if anyone of u have ever been stuck with the same problem and maybe found a fix to it that would mean a lot to me if u could share it with me…