I have AutoCAD 2002 and several dwg files in AutoCAD 2000 format. When i try to "copy-paste as a block" an object (stairs in a house for example) the "Paste as a block" or "Paste" command is disabled. I create a new drawing, draw a line and paste it to the previous drawing .. The paste is DONE ! Why can't i paste from the first drawing ? A friend of mine uses AutoCAD 2005 and he has no problem at all with this drawing. Thank you