showing run time error 3134 in access from

showing run time error 3134 in access from

it is giving me an run time error 3134 syntax error in insert into
statement while clicking on the control.
Private Sub CmdAddNew_Click()
'add data to table
CurrentDb.Execute "INSERT INTO
tblemployee(,firstname,lastname,Address,city)" & _
"VALUES('" & Me.txtfirstname & "','" & Me.txtlastname & "','" &
Me.txtaddress & "','" & Me.txtcity & "')"