Convert lines to fills problem

I made a map using adobe illustrator 10. I then exported the map into flash mx as swf file. I was able to open the file as open as library. I drag the swf map inside another movie clip. It works fine and have the swf break apart twice but as soon as I try to convert it to fills a window appear stating that I performed an illegal operation and flash will be closed. I tried several times but to no avail, same things happen.

can anyone knows why is it happening? does anybody have any other solution on how to convert lines to fills?

thanks in advanced!!!