Need some help here!

I am using Cold Fusion 7 MX standard and SQL server 2000 sp4 on Win XP sp1.

All of the installation and setup looked good.
When I working on development ,it suddenly showed

Reason of failure"java.sql.SQLExecption: [Macromedia][SQLServer
JDBC Driver]Error establishing socket. Connection refused:connect"

After serveal tries of restarting CF service it worked again for next couple
hrs
then went down.

Anybody familiar with this problem? please advice.

thanks