The installed flash player does not support flexbuilder debugging.

In Flex builder 3.0, trace () is used for debugging (debug mode, or F11 can be used directly. If it is not run in debug mode, the trace function content will not be output.) The following prompt is displayed:

Installed flash player is not a debugger

C: \ windows \ system32 \ macromed \ Flash \ flash10a. ocx
Flex Builder cannot locate the required debugger version of Flash Player. You might need to install the debugger version of Flash Player 9 or reinstall flex builder.
Do you want to try to debug with the current version?

This is because Flash Player debugger 9 is installed in flex builder 3 by default, and the latest version is Player 10 debugger. If 10a is installed, this error is occasionally prompted.

Download the http://download.macromedia.com/pub/flashplayer/updaters/10/flashplayer_10_ax_debug.exe or www.adobe.com/support/flashplayer/downloads.html
Find the corresponding flex version, and then restart the flex application.

If the installation fails, a version conflict may occur and the installed version cannot be automatically uninstalled.

Solution to Adobe Flash Player ActiveX control installation failure (you can also try to uninstall the control in step 1 only)
1. Download and install Microsoft subinacl. MSI
Http://download.microsoft.com/download/1/7/d/17d82b72-bc6a-4dc8-bfaa-98b37b22b367/subinacl.msi

2. Download reset_minimal
Http://www.adobe.com/support/flashplayer/ts/documents/fb1634cb/reset_minimal.zip

After decompression, copy reset_minimal to the installation directory of subinacl. MSI), run reset_minimal, and then prompt "press any key to exit ".

3. Download The Flash Player uninstaller and perform the uninstallation operation.
Http://download.macromedia.com/pub/flashplayer/current/uninstall_flash_player.exe;