Special characters vanish when passed to webservice on Oracle AS 10gR2

I've created a rpc webservice with an "echo" method. It has a single String parameter and simply returns this parameter. I've been using JDeveloper 10.1.2 and deployed this webservice onto OAS 10gR2 (10.1.2). To access it in client application I used proxy generated by JDeveloper. Problem appears when I pass the value containing special characters like < or >. Echo method receives this value without these characters. So client sends something like <hello> and webservice sends back hello instead of <hello>. I've tried to replace < and > with '& lt;' and '& gt;' but then & character is lost. So from '& lt;hello& gt;' client receives lt;hellogt;.
This problem doesn't appear when I deploy webservice to Oracle AS 9.0.4 so I suspect it has something to do with AS configuration.
I would appreciate any help.

take a look at
http://www.oracle.com/technology/products/ias/portal/html/javadoc/xml_tag_reference_v2.html
and look for <escapeOutput> parameter - "Controls whether control characters in the response from the web service (such as '<' and '&') are escaped in the portlet response so that they display in HTML" - the default value is on, meaning special characters are escaped - this parameter applies only to Oracle Portal, but maybe there is a similiar parameter for AS

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Thanks for your reply DrClap. What you said regarding posting the query without understanding the code is correct. But I am not expert in XML and I didn't worked on it previously. I suddenly got the request to implement this in our application and i don't have time to learn, so i did some search and found the below code and used that in my program.
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Hi!
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There is also some fields on the webservice, tws.setRequestHeader() that may allow you to set the username and password on the request, but this doesn't make sense to me. It shouldn't be that hard.
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Question about special characters in XML documents

Hi,
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Hi Dr.Clap,
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Check this
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Hi,
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Attachments:
Special Chars.seq ‏27 KB
String Passing.vi ‏13 KB

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Special characters vanish when passed to webservice on Oracle AS 10gR2

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