Had a polling problem after buying a windows 7 machine with no serial port and upgrading to Flexi Cloud. Bought a Keyspan serial/usb adapter and loaded drivers provided by Tripp Lite with the adapter. Leave new adapter unplugged until driver loaded, then plug in adapter and reboot both PC and cutter. Software chose Com 6 but polling would only recognize vinyl dimensions once. Changed both Keyspan and Production Manager to Com 1 with no help. But, when I changed both back to Com 6, polling has since worked consistently. Possibly the change to Com 1 cleared Com 6. Not sure that is the reason but wanted to let folks know what worked for me.