如果要flex调试,必需要满足两个条件：
1、浏览器的插件为Debug版，具体可以在播放flash文件时点右键，看有没有调试一项。不是的话可以adobe站上下。

Download the Windows Flash Player 9 ActiveX control content debugger (for IE) (EXE, 1.59 MB)

Download the Windows Flash Player 9 Plugin content debugger (for Netscape-compatible browsers) (EXE, 1.56 MB)

Download the Windows Flash Player 9 Projector content debugger (EXE, 3.69 MB)

Download the Macintosh Flash Player 9 Plugin content debugger (Intel-based Macs) (DMG, 5.35 MB)

Download the Macintosh Flash Player 9 Plugin content debugger (PowerPC-based Macs) (DMG, 2.41 MB)

Download the Macintosh Flash Player 9 Projector content debugger (ZIP, 4.81 MB)

2、调试的时候是点击debug按钮，点运行是出不来的。

另：

浏览器设置方法为windows-->Preferences，选General-->Web Bowser