When ever i try to go on Battle.net on Warcraft 3 reign of chaos and frozen throne i get a message saying, Unable to connect to Battle.net.
You may be trying to connect to an invalad Battle.net server. if you are using a modem you may need to manually connect to the internet before connecting to Battle.net.
How can i fix this?

Hi, Chickenboy

Your connection has been temporarily restricted from Battle.net. This restriction is realm-specific and can last up to 2 weeks.

It can happen for any of the following reasons:
- Using an invalid CD key
- Rapidly connecting and disconnecting to Battle.net
- Creating or joining numerous games within a short time period such as "Magic finding" or "Baal runs"
- By the use of "add-on programs"
- Chat channel abuse
- Failed login attempts
- In game latency caused by excessive spell effects

We are unable to lift these restrictions early or tell exactly why the restriction was placed on your connection.