I can't overwrite on fonts system with NSIS

Hello everbody !

I can't overwrite fonts system of windown XP, can you help me ? or give me for example. My command line:

SetOverwrite on
SetOutPath $INSTDIR\fonts
;SetOutPath c:\windows\fonts

File ..\TinhLai\Fonts\VN-NTIME.TTF
File ..\TinhLai\fonts\SSERIFE.FON
File ..\TinhLai\fonts\TAHOMA.TTF
File ..\TinhLai\fonts\TAHOMABD.TTF
File ..\TinhLai\fonts\VNCOUR.TTF

Who is everbody know ? can you help me ?

Stu