xml special symbol problem

I am using actionscript 2 inwhich i am receiving data from server in XML format. Also i send request to server in XML format. But when using special characters like " " , ; it gives some problem. What can be the best way to handle XML data?

Put your text in CDATA

e.g.

<nodeName><![CDATA[Put ur text here]]></nodeName>

Thanks vinayak it worked!!!!!!!!!!!!!!!!!!!!!

Now i want to make a xml req in a string and then parse it into xml. So my code is

xmlStr = "<username>" + (![CDATA[xmlInfo.GetUserName()]]) + "</username>";
xml.parseXML(xmlStr);


But I get the error at the first line
There is no property with the name 'CDATA'.

whats wrong?