If you click print on the computer but the file does not load onto the laser cutter, make sure you selected the correct driver from the print dialog box (do not select a grayed out driver). Next, try unplugging the red USB cord on the back of the computer and plugging it back in.
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If you click print on the computer but the file does not load onto the laser cutter, select the correct driver from the print dialog box (do not select a grayed out driver, select the one that is status "Ready"). If that won't work, try unplugging the red USB cord on the back of the computer and plugging it back in. It was probably unplugged or not making contact well enough.