hello again
I solved my problem with the display, thank you jggimi, I simply changed my DefaultDepth from 16 to 24. When I configured X, I checked my monitor's specs and it says the maximum depth is 16 millions so, I thought it would have been better to set it to 16. I guess I don't know exactly what I'm doing. But it works fine now.
Now I would like to ask another question but I guess it's better to open a new thread since it's about installing mlterm from source.
see you soon