Hello guys,
Thanks for your answers, in fact via the "Module Manager" I've just unstalled the Mig-21 and after that just downloaded the "MIG-21BIS_1.2.15.37241.680-415.exe" and installed this new version and now everything seems OK..
Mainstay I have the problem like you, read this topic: http://forums.eagle.ru/showthread.php?t=139589
Once again a great thanks for your help, Skull.