Problems with XFree86

[Jose]

Hi I was using Starnet Xwin32, but because it is an evaluation program I 
switched to XFree86.  It works fine, but when it displays formulas like 
for example \theta it displays a \mu.  When I create the dvi it shows 
the theta.  So I don't know is some type of configurations.  Does 
someone has an idea how to fix that.

Thanks

Jose