Nodes status show blue status

Hi davidy2001 , 
     The nodes are shown with blue squares because you do not assign a health monitor for them. 
so to show there status and make them available , you need to assign a health monitor. 
> Steps 
- open one of your nodes. 
- Configure it as below snap shot : 

and Click update. 
- open the Nodes list again you will see it becomes available like below snap shot : 

> I recommend that , Do not assign much health monitors on your device , the pool members health monitors is sufficient , make your virtual server or application available. 
- much monitors make a headache to you device , and cost CPU processing as well , you need to reduce  your monitors. 

Hope this helps you. 
Regards