Sounds like this is an embedded macro into the drawing and macros have been disabled on that computer to prohibit viruses.
I'm drawing a blank here on how to change that setting.......OK, Type VBARUN, go to OPTIONS, uncheck the box that says "Enable Macro Virus protection". The next time a drawing is opened a dialog will come up asking to disable,enable or do not load, uncheck the box that says "show this dialog next time" (or something close to that) then select Enable Macros.
That should do it.....