how to set encoding type for e4x result

I have a application with front end Flex and Server side App in Java. I am using HttpService to communicate to Java application (Web). I am sending data in xml format to flex and parsing it as e4x format. From service side I am setting the charset as windows-1252 and xml encoding is also windows-1252. In Flex I am getting some junk characters. But When I post the same http request from browser, I am able to view the characters with expected encoding.
Can anybody clue me on getting xml data in required encoding type (charset) in Flex.

Thanks in Advance,
Gokul Ram.T