bluetooth is not working in my two printers Zebra QLn 320 with bluetooth

When I first turned on the printer Zebra QLn 320, I have not burned bluetooth icon on the printer. I have decided that it is necessary to set up and activate it through a zebra setup utilities, but it did not help! I do everything according to instructions. I enter the network name, visibility, type of protection but the bluetooth icon does not light and no device sees its bluetooth! I tried through zebranet brige but it does not solve the problem! Two printer with 100% bluetooth! when the test print configuration settings have bluetooth but two printers is not lit bluetooth icon and it does not work! How to solve this problem? I tried to update the firmware does not work!