The most common cause for this is that a popup blocker is turned on. In certain instances, MSM will use a popup to display the tags to print. The reason for this is so that when you are done printing, you can simply close the window and are right back on the print tags screen, in case you want to print another set.
A simple way to stop the popup blocker is to hold down the CTRL key when you click on the print button. This will disable the popup blocker for that particular link. You will need to do this each time you click. If you want a more permanent solution, read below...
Following are some instruction documents for turning off popup blockers.
Working with the IE popup blocker:
http://www.microsoft.com/windowsxp/using/web/sp2_popupblocker.mspx
Working with other common popup blockers:
https://host.softworks.ca/Agate3/blocker/disable-blockers.htm
One thing that is important to note, and often overlooked is that it is not uncommon for a computer to be running more than one popup blocker. Almost any IE toolbar that is installed (google, yahoo, aol, etc.) has their own popup blocker. If you disable the IE popup blocker, then the toolbar popup blocker just takes over. So you will need to modify or disable ALL the popup blockers that may be installed.
2. You hit the "print tags" buttons and the wrong tags, the ones you already printed, show up, but not the ones you want!This is usually an issue with cached files in the user's browser. You should delete your temporary internet files and this should resolve the issue. Specific instructions for how to do this are (in Internet Explorer):
1. Choose TOOLS > INTERNET OPTIONS in Internet Explorer
2. Click the DELETE FILES button. Click "Delete All Offline content" checkbox and click OK.
3. You print your tags, but the description line is "garbage" and just scrambled letters!