Ant mxmlc task don't compile with FlexSDK 4

1

Hello.
I try to compile via ant with Flex 4 SDK, but get an error:


  <mxmlc file="${src.dir}/Client.as" output="${bin.dir}/client.swf" keep-generated-actionscript="false">

			<load-config filename="${FLEX_HOME}/frameworks/flex-config.xml" />
			<source-path path-element="${FLEX_HOME}/frameworks" />
			<default-size width="${swf.width}" height="${swf.height}" />
			<default-frame-rate>31</default-frame-rate>
			<default-background-color>0x869CA7</default-background-color>
			<use-network>false</use-network>
</mxmlc>

when FLEX_HOME = D:/Distr/adobe/flex_sdk_4.0.0.3309/ - an error throws:

BUILD FAILED
D:_work_workspaces hird_new\p2p\build.xml:105: The class not found in jar file: mxmlc.jar

It is very similar with this, but there shown fix status.

With Flex 3 sdk - all works good. How to resolve this ?