Some Problem with Smartphone App Dev (keep updating)

(1) Recently , I tried my first smartphone application,but now ,I have a problem with checkbox and label controls. My application can run sucessfully in smartphone emulation(chs version),but when I install it in my own smartphone(MPX220,OS: windows mobile 2003 se ,Wince 4.20),the text of checkbox and label cannot be displayed,the font which I set is Song. It really puzzled me, Anyone got the key?