HUDtext with comma and minus signal

[SergioFeitoza]

I am trying to write a number like -2,00 (minus two) using HUDtext but the comma and the minus signal do not appear
I use the line GLHudText1.Text:= FloatToStrF(res3DminForm3D, fffixed, 8, 1);
The text appear as 200 instead of -2,00
Can you help me ?