run time error 91 object variable or with block variable not set

i have 4 labels

one label date and another time

how can insert them in mysql

lbl4 = lbl4.Object ----->error here
lbl6 = lbl6.Object
lbl2 = lbl2.Object
Label2 = Label2.Object
txt1 = TextBox3.Value
txt1 = TextBox1.Value
txt1 = TextBox2.Value
Me.lbl2.Name = ""
Me.lbl4.Name = ""
Me.TextBox1.Value = ""
Me.TextBox2.Value = ""
Me.TextBox3.Value = ""