Drawing in read only mode...continued

I will attach a drawing file with this problem.  It was created in Solid works 2009 SP4.1 or SP4.0.  The drawing was created then saved.

when I brought it back up I could not add anything to it.  I can edit existing annotations.  But cannot add anything.  Check it out.  This did not

happen to all of my Draw files, but most of them.

SolidworksDrawings And Detailing