xf86config failed. Need help!

Hi, We baught the debian potato linux CD package, and installted it on a new IDE hard drive. There is error message came up during installing selected packages. The message is as below: Processing was halted because there were two many errors. E: Sub-Process /usr/bin/dpkg returned an error code(1

Need help

rno 111): unable to connect to X server xinit: No such process (errno 3): Server error. I tried several times to re-created the xf86config file, and selected the exact monitor and Video card's data. The same thing happened. I wondering this is a bug or just happened in my machine? How to solve this problem. Could you give me any advise or suggestion. Thanks Tim Xu