Sorry,I don't use the ubuntu linux system these days.When I enter the system, I'll try to solve the problem as you said.By the way,should I do some operations to indicate the problem on the website so that the others could know the problem has been solved. I'm a freshman in the ubuntu forum,so I don't understand the rule very well. My English is poor. I hope you could understand what I say above. ________________________________ 发件人: Phil M