You can not use any tabs in Gruss that are linked to the The Bet Machine.

At default that is the first 3 tabs in Gruss as shown below.

If you wish to use Gruss then you will need to create a NEW tab. Press the 'New Page' Button as below -

A New Tab is created and highlighted. You can then either navigate on the Market Tab to individual markets or populate the Quick Pick List.

In order to populate the Quick Pick List go to Market --> Horse Racing --> UK/Ireland. Then choose which races to load.

The Quick Pick List for the New Tab is now populated. This extra tab is great for following the racing over the course of the afternoon.

Just remember - DO NOT TOUCH the tabs that The Bet Machine is linked to. If you do change the market shown in the linked tabs The Bet Machine will detect this and try and reload the correct markets.