Try to download the Flash Player 9 debugger from the Adobes official site.
Please find the link below:
Browse the above link and click the link below in the page and download and install the flash player.
Download the Windows Flash Player 9 ActiveX control content debugger (for IE) (EXE, 1.61 MB)
After this the debugger should defenitely work for you..
If this post answers your question or helps, please kindly mark it as such.
With Flash Reader 9 and the bebugger 9 I can debug. But with the Reader 10 and the debugger 10 , the program complains that it can't find the debugger. I'm currently using the latest release of SDK 3. I tried to use the SDK version 4 but this only added to the grief. Either I'm missing something or there is an inherant incompatibility between what I want and Flex builder 3. Thanks