Brother P-Touch QL-500 not printing with new Lenovo G710

I cannot get stickers to print.

I have used and still can use my Brother QL-500 sticker printer on my old Dell laptop that runs Windows 7.

I have upgraded to a Lenovo G710 running Windows 8.1.

I have installed the printer and downloaded the correct driver from the Brother website. I have checked on the Lenovo Solution Center software and it agrees that both the printer and driver are there and in a healthy state.

I sell items on Amazon and need to print off unique barcodes. It is through the Amazon website that I request my Brother printer to print off these barcodes. When I request a barcode I get sent to the Oracle website: http://www.oracle.com/technetwork/java/index.html

I have downloaded Java and it is enabled in my browser.

I have a continuous roll of stickers in my Brother machine set at 62mm wide and set at 29mm long. When I ask for a test to be printed the Brother machine's green light flashes quickly and continuously.

On my old laptop I get a message at the start of each time I begin to use the sticker machine asking If it is OK to allow the machine to print (when I am asking for stickers while on the Amazon website).

I am now assuming there is a conflict somewhere?

Please can some one point me in the right direction?

Many thanks in advance!