急！！图纸打不开了，也修复不了！咋办？？

今天要画完的图纸，突然程序出错要关闭。可再打开图纸时AUTOCAD提示以下内容：
Unable to load this drawing file because it contains incorrect or corrupted information:

The technical problem detected is:
d:\top11\top.dwg
The "Recover damaged drawing" selection may be used to restore undamaged
material from this file:
.
然后不能加载。用AUTOCAD修复也不行，有以下提示：
Unable to recover this drawing file.
有谁知道怎么办吗？难道我要重画吗？天啊！！大家帮我呀！！
小弟不慎感激！！多谢了！！