Take a screen shot (hit the "Print Scrn" key ont he keyboard).
Then open up MSPaint (type "mspaint" in the run command on the start menu).
Then paste (ctrl-V) the screen shot into mspaint.
Now print that. If you just get one big gray box or the like you may have an issue with your print driver (I mean LV isn't even in the picutre then) and should probably reinstall your printer.
-Taz