I have faced this issue earlier and recently faced it last weekend. It seems mobango.com has been blocked by MTNL triband. The connection does not even attempt any sort of initial connection. Just Problem loading page for it. :S
I have faced this problem but with multiple site. The issue seems to be with the DNS that MTNL uses. Switch to OPENDNS (in network connection properties) and you should not face this problem. Atleast thats how my issues were solved.