为什么SQL Server在将date.today提交到datetime列时给出转换错误?

每次尝试向SQL Server提交日期值时,都会收到一个转换错误。SQL Server中的列是日期时间,在VB中,我使用date.today传递给我的参数化查询。我一直收到一个SQL异常

从字符串转换日期时间时转换失败。

下面是代码

Public Sub ResetOrder(ByVal connectionString As String)
        Dim strSQL As String
        Dim cn As New SqlConnection(connectionString)
        cn.Open()
        strSQL = "DELETE Tasks WHERE ProjID = @ProjectID"
        Dim cmd As New SqlCommand(strSQL, cn)
        cmd.Parameters.AddWithValue("ProjectID", 5)
        cmd.ExecuteNonQuery()

        strSQL = "INSERT INTO Tasks (ProjID, DueDate, TaskName) VALUES " & _
        " (@ProjID, @TaskName, @DueDate)"
        Dim cmd2 As New SqlCommand(strSQL, cn)
        cmd2.CommandText = strSQL

        cmd2.Parameters.AddWithValue("ProjID", 5)
        cmd2.Parameters.AddWithValue("DueDate", Date.Today)
        cmd2.Parameters.AddWithValue("TaskName", "bob")
        cmd2.ExecuteNonQuery()
        cn.Close()
        DataGridView1.DataSource = ds.Projects
        DataGridView2.DataSource = ds.Tasks
    End Sub

任何想法都会受到极大的赞赏。