*Check if your internet is OK and see if you can open other sites.
*Reset your router (restart your internet connection) and try again.
*Reset your computer's DNS Cache ->
Click this to see how to do it .
*If nothing so far worked go and call your internet provider and tell them that you cannot open exactly this address: 72.8.189.45 Internet Service Providers sometimes block sites/ip address ranges by mistake and this is the most possible reason why your "Connect" button is missing.
If noone of those steps can help you, then follow those steps:
*Go to this website ->
http://www.showmyip.com.ar/
*Copy and sent your IP Address to any of our Administrators -> RESiSTANT