Help: Papago X8 error font

Hello all brother,

I user a Navi of china with WinCe 6.0
Port: Com 1
Baud rate: 4800
Resolution: 480x272
Map: Vietnam

I used Papago X8 but font in Map error, they into squares on the map.
I copied font "Tahomabd.ttf" in folder "Navi" but not ok.
when i copy Happyfile Com1 of resolution: 800x480 in folder "Navi" font is ok but map location wrong.

anyone can help me this problem.

Or Send for me new happyfile

Thank you very much