ooppss!! i got it thanks !! i found it from the net lol~~ let me post this out for some people if they still dont know how to fix that problem

please search this code in the template - "content=”text/html; charset=iso8859-1"
"iso8859-1" is the default one so we have to change that to "big5" which is ---> "content=”text/html; charset=big5"
save the template and now it works!!
