Nothing inside X Window for newly created User ID
Today, I have created some User IDs. Then, I typed "startx" and X Window can be started.
There was "nothing" inside the X Window. I could only typed "Ctrl-Alt-Del" to logout to text mode. However, there was no problem for those users who had been created long time ago. What's has gone wrong? And what should be checked? Please give me some hints. Many thanks.