UTF-8 characters changed

Hi,

My Flex web app retrieves and saves data to DB2 via Web Service and Java
It works fine, however often users use some UTF-8 characters,
especially foreign currency characters - British pound, Euros, Ecu, Yens,
etc
So they put that character on screen and save in DB2.
However, when that row is retrieved, it is several other characters instead.
We don't do any escape or encodeURI there.
Why does it happen and how to fix it?