Missing Blocks in Drawing

by Shelly
(New Mexico)

I received a drawing from our contractor and proceeded to open the drawing on AutoCAD 2009 and as I opened the drawing several items were missing.

So I contacted the contractor and he assured me that the items I was missing was showing on his screen.

So I forward the e-mail to my coworker and the items that I was missing were showing up on his computer.

So I thought I'd have the IT department come in and repair my computer. They tried and told me that everything was installed correctly.

I had to re-insert the drawing block and it came back into my drawing but when I had my coworker look at it again he said I was showing double blocks in the drawing.

This is getting ridiculous and I am looking for help. Autodesk support suggested several ideas but nothing seems to work.