Make sure the printer is calibrated. It should feed 1 label only. If it does not default it to force a calibration. hold pause and feed while off then turn on, count to 6 and release the buttons. You also need to set label height and width in the printer driver. Both zebra designer and zebra universial. goto printers and faxes and right click on your printer driver chose properties, this opens up on the general tab.

Configuration changes for current job and Default Configuration changes
There are two places in the driver configuration to change print configuration. In Windows 98, ME, 2000 and XP, go to the "General" tab and click the "Printing Preferences..." button. This menu of configuration parameters are the settings that are in effect for the current print job. Any changes made here will only affect the current, or next, print job. These settings are initialized for each print job from the configuration defaults.
Go to the "Advanced" tab and click the "Printing Defaults..." button. The displayed configuration menu describes the default settings for the driver. These settings are used to set the initial "Printing Preferences..." for new print jobs. It is a convenient place to set parameters that seldom change in you environment. Commonly set default parameters include Printer firmware, Media Settings, Device Options, and Page Size.
On Windows NT, these menus are available when you right click on the printer name in the Printers folder. The pop-up menu contains selections for "Printer Settings" and "Default Settings" which take you to these screens in the driver.