Problem in using StrConv Function

[Norton]

I am using StrConv to convert simplified chinese encoding string to a
traditional chinese coding string

strResult = StrConv(strSimp lifiedChinese, VbStrConv.Tradi tionalChinese)

It works on one computer but it always return ??? in the other computer

all windows have installed the chinese fonts

Could anyone knows what's missing for the computer configuration?
thx in advance!