Thirdparty component not working

Heyy all, I have tried the sample AS3 components from jumpeyecomponents.com and flash-filter.net. i have installed them for flash cs3 and flash cs4 both. In my fla code in written in as 3. when i use the components in fla and publish it using cs3 and player 9 setting it works. But when i publish it using cs 4 and flash player 10. Everything gets messed up and flash doesn’t show any error. I must have to publish in cs4, player 10 because in my code there is unloadAndStop method is used which is only supported by flash player 10. http://help.adobe.com/en_US/AS3LCR/Flash_10.0/flash/display/Loader.html#unloadAndStop() Please let me know what can be this problem that a component which is writen in as3 works in flash cs3 player 9 and not in cs4 player 10. Hoping for a quick reply. Thanks