does your custom component has width and height properties set? or at least percentHeight or percentWidth?
Hey, Thanks for you quick response.
I don't implement these properties my self. But I think they may come from UIComponents. I tried setting the width and height property in the mxml markup - but the component still doesn't show up.
easy solution is to go with more advanced containers for your base custom class, use mx:Box, mxVBox, mx:HBox instead of UIComponent,
and your problems will be vanished then
Hey, Cool. Thanks that was it