Try removing "AttachDBFilename=|DataDirectory|TimeTracker.mdf;" from your web.config.

An example, but that's without integrated security. Anyhow you would have to specify the Db name:

<add name="connStringName" connectionString="Data Source=COMPUTERNAME\SQLINSTANCE;User ID=UID;Password='PWD';Database=NameOfDb;Trusted_Connection=False;" providerName="System.Data.SqlClient" />

Hope this helps. 

Cheers!

/Eskil