I had to do this, though I'm not sure what the Avery # was for this. Are you using the labels option in Access? I couldn't figure that one out. I ended up setting up a blank report and getting one label to print in the correct place how I wanted it. Then I just selected everything and copied it across....printing one to make sure they all lined up where they should. Then copied all those and pasted them underneath for the next row, etc, etc.
Took a lot of messing around but I did get it to work.