Invalid Objet Name Exception Thrown on Update

Question

I have a project using Simple Repository which was working before I rebuilt my dev machine. This may just be coincidence but I am now using SQL Server 2008 Express to develop against rather than 2005 and now when I run my project I get the exception "Invalid object name 'TableName'". the table exists as records are inserted fine but when it comes to update a record that is when the exception is thrown.

In case it helps this is an example of the code where the error is thrown:

    /// <summary>
    /// Updates the specified entity.   
    /// </summary>
    /// <param name="entity">The entity.</param>
    public void Update(IList<Result> entity)
    {
        using (TransactionScope ts = new TransactionScope())
        {
            using (SharedDbConnectionScope scs = new SharedDbConnectionScope())
            {
                foreach (Result result in entity)
                {
                    Update(result);
                }

                ts.Complete();
            }
        }
    }

    public void Update(Result entity)
    {
        repo.Update(entity);
    }