I want to invoke webservice method calls asynchronously through my client (so as not to wait for the response for long time).

I am using the following bindings file and wsimport ant task to accomplish using an example from online source

I tried bindings for that particular node (only one web service WSDL or globally for all WSDL's). Below is with globally with all WSDL's. Either way I am out of luck as asynchronous call is not working. Online sources specify using this on Bindings file.
enableAsyncMapping=true

Please provide any suggestion if you used it with JBOSS4.2.2 with Seam.

custom.xml after xml version name (global bindings used here)
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<bindings
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
xmlns="http://java.sun.com/xml/ns/jaxws">
true


wsimprot ant task below.
binding dir="" includes="custom.xml" (Above file)