No, he is loggin in trough GDM and since GDM can't find his display manager, GDM drops him to a failsafe terminal.
aeguzmanv: Did you do a "full" install ?
The easiest way to fix this, at this point, would be reinstalling Mandrake. Since you're a newbie, explaining loads of commands isn't gonna help you. I suggest you reinstall,
good luck, and good that you chose to switch to linux!