http://support.chess.com/Knowledgebase/Article/View/167/0/my-internet-connection-is-fine---why-am-i-getting-disconnects
connection interrupted

First you need to describe your OS, Browser and ISP connection. If the first link provided by iused doesn't help try this (and bookmark for future reference)
http://blog.chess.com/NimzoRoy/diagnosing-and-fixing-internet-problems
Every 12 sec "connection interrupted" How do I fix?