Offline (Enabled) - The children pool member(s) are down

Hi Friends,

I am novice to F5 and following CBT Nuggets to understand LTM in a better way. I have completed basic configuration i.e defined Nodes, defined Pool and assigned Pool Members to my Pool.

Now the problem is that I have enabled "http" health monitor and right after I click 'finished' the icon Transitions from 'Blue Square' to 'Rectangle Red' - Offline(Enabled) - The children pool member(s) are down when I hover over the Pool in 'Pool List'.

Now this is a very basic setup with 3 .OVA web servers pre configured which I received in my Nuggetlabs.

I am able to login to the servers using my browser, telnet 10.2.0.11 80 and curl http://10.2.0.11 commands but the Servers are showing as Offline(Enabled) - Pool member has been marked down by a monitor in 'Members' list.

I need your help to proceed further please.

Thanks in advance,

Sagar