为什么保存控件什么文本都没输入也能保存成空白表~求解

Private Sub StylerButton1_Click(Index As Integer)
Dim cn As New ADODB.Connection
cn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\db1.mdb"
cn.Execute "insert into 车辆档案表(档案编号) values ('" & Label5.Caption & "')"
cn.Close
If Text1 = "" Then
                MsgBox "姓名不能为空", 4, "农机档案管理平台"
                Text1.SetFocus
                Exit Sub
            End If
If Combo1.Text = "" Then
                MsgBox "档案类型不能为空", 4, "农机档案管理平台"
                Combo1.SetFocus
                Exit Sub
            End If
If Text4 = "" Then
                MsgBox "档案编号不能为空", 4, "农机档案管理平台"
                Text4.SetFocus
                Exit Sub
            End If
MsgBox "保存完毕！"
MSHFlexGrid1.Refresh
Set MSHFlexGrid1.DataSource = rs
rs.Refresh
End Sub