Flex, Spring, BlazeDS mxmlc task not found

Here is the perfect tutorial for integrating Flex SDK (free) with Spring: http://www.adobe.com/devnet/livecycle/articles/blazeds_spring.html

It's really helpful, just that the Mortgage example has a mistake in the build.xml:

should be


and not:


In which case you get an ant exception that mxmlc task does not exist.

PS: there are other nice tutorials but this is the best one especially if you are new in Flex (the other ones forgot to mention how to compile the mxml code in bytecode => swf files)