Chinese characters in source object is emitted as ? Characters in XML

[Peter Maher (POZ Ltd)]

Is there a problem with JaxMe and Chinese characters?  

I am setting my source object property (which is a String) to the following 
"Documentary evidence (此�f明文件)" 
Storing the Chinese in a file and editing with a Hex editor shows that the bit 
in brackets reads E6 AD A4 E8 AA AA E6 98 8E E6 96 87 E4 BB B6

But when I marshal my object to XML I get "Documentary evidence (?????)"
In hex the bit in brackets is 3F 3F 3F 3F 3F

Any ideas about this?

Thanks

Pete.