thx for Qishi's kind response, that's a really new way for me 2 open Photoshop, i'll try it tomorrow!!! wish i could fix it by it!!!
and 2 Streakingant:
i do use a part of my disk about 1G size ,maked PHOTOSHOP, 2 serve for the Photoshop. there is nothing saved in it,and i set it as the primary scrath disk in the "preference" item(ctrl+k) in photoshop. so,u know ,i am so confuse now......
any way,thx for all of u kind help........