Hello.
Version of LV, which you are using, is not reason why you can not use this control on your VI. Main reason why you can not use this control you can see if you click on broken arrow on your VI.
If you do that you will see explanation: '' XControl 'Colormap': XControl Colormap not supported for current target''.
So, RT target which you are using does not support this function. This is resonable because usually we have need for data presentation on host part, not on RT part of the code.
I hope that this answer will help you.
Best regards,
Sofija