1. Launch SQL Optimizer by selecting Windows Start | Quest Software | Quest SQL Optimizer for SQL Server.
2. Click “Connections” on the top-right corner.
3. Delete existing connections by right-clicking connection item and selecting “Remove selected entry”.
4. Use IP address as server name to create a new connection.
If you can connect to the server, create a new connection in Toad, with IP address as server name, and then you can launch SQL Optimizer from Toad.