Windows 10 - Start 10 taskbar icons not showing on my main monitor?

Hello, can someone please tell me how I can get my task bar icons to show on my main monitor. I have four monitors but one is always turned off while I am not streaming. 

However the task bar icons are being shown on number three and number four monitors.

Number two is my AverMedia Live Gamer Xtreme 2 capture card which is duplicated to monitor one.

Any help will be much appreciated as I have looked at all the settings and changed a few things. But still the icons are not appearing on my main monitor.

Thanks.