ANT Debug

I'm trying to use ANT with Flash Builder 4 to compile and debug.

The compiling is the easy part but having trouble to get the debugger to work.

I want to use ANT to Debug SWF file inside Flash Builder, so that breakpoints, console traces and everything works as it should.

My script so far. Builds The *.as to *.swf and moves from bin-debug to deploy folder. How can I start a Flash Builder Debugger for the created SWF?

<!-- this opens the file in Flash Debug Player, but Flash Builder IDE doesn't understand this? -->

<exec executable="open" vmlauncher="true" spawn="false" failonerror="true">
     <arg line="-a '${flashPlayer}' '${DEPLOY_DIR}/${file}'" />
</exec>

<!-- to run, compiles and then open -->

<targetname="Compile level 1">
    <antcalltarget="compile flex file">
        <paramname="file"value="GameOffice"/>
    </antcall>
    <antcalltarget="open player">
        <paramname="file"value="GameOffice.swf"/>
    </antcall>
</target>

<!-- compile *.as to *.swf, move from bin-debug to deploy (to fix Flex SVN issues -->
<targetname="compile flex file">
    <mxmlcfile="${SRC_DIR}/${file}.as"output="${BUILD_DIR}/${file}.swf"
        actionscript-file-encoding="UTF-8"
        keep-generated-actionscript="true"
        incremental="true"
        static-link-runtime-shared-libraries="true"
        show-actionscript-warnings="true"
        failonerror="true"
        debug="true"
        optimize="false">

        <load-configfilename="${FLEX_HOME}/frameworks/flex-config.xml"/>
        <source-pathpath-element="${FLEX_HOME}/frameworks"/>

        <compiler.include-librariesdir="${basedir}/libs"append="true">
            <includename="HelloThereLibGames.swc"/>
            <includename="HelloThereLibStructure.swc"/>
            <includename="HelloThereLibUtils.swc"/>
        </compiler.include-libraries>

        <metadatadescription="Hello There Production">
            <contributorname="Fredrick Bäcker"/>
        </metadata>

    </mxmlc>
    <copytodir="${DEPLOY_DIR}"file="${BUILD_DIR}/${file}.swf"/>
</target>