I am having trouble with my sheet sets. I think it may be a 64bit Vista issue but I am not sure of it. Once I open a sheet set I can't open a different one unless I completely close CAD. I also have issues with it changing the names and numbers of the drawings when I publish from the sheet set. I have had this problem in 2009, I thought it would be corrected in 2010 but It's not. I didn't ever have the problem until I started runnning Vista 64. We have 2 machines running Vista 64 and both have the same problem. Our machines that have XP don't have these issues. Any Ideas would be helpful.