problem with spmap label in persian language

[Javad Ebrahimzadeh]

Hello.
I'm plotting map with spmap command and i want to label the name of any city in persian language but stata does not show more than 6 letters and show ? character for two word names like this picture

used code is

spmap PC using gilcor, id(id) fcolor(Blues) label(xcoord(x_n) ycoord(y_n) label(city2)) legend(label(1 "شهرستان های فاقد پایگاه انتقال خون") )

I would appreciate if anyone helps

[Javad Ebrahimzadeh]

All dear
i solved the problem. just add length(21) to label code.
this's final code

  spmap PC using gilcor, id(id) fcolor(Blues) label(xcoord(x_n) ycoord(y_n) label(city2) length(21)) legend(label(1 "شهرستان های فاقد پایگاه انتقال خون") )