I found it !!!
It's a version problem..
The drawing was in 2002...so i got the print layer problem..
but saved in 2004...it fixed..
Now the problem is...many of our client are in 2002.....again.
so that why our AutoCAD installation was configured to automaticly saved in 2002.
But got the error for XREF layer set to "NO PLOT"
thanks all...
but need to study again.. :kewl: