Run-tim error 3061? Why?

Whats wrong with this? I use the code in in Access.
I get: Run-time error 3061. To few parameters. Expected 1.
The form frmTest is open when the code is running.

VB Code:

Sub GetValue()
 
   Dim DB As Database
   Dim RS As Recordset
   Dim SQL As String
 
   SQL = "SELECT * FROM tblTest WHERE [Field1] = [Forms]![frmTest]![Text3]"
   Set DB = CurrentDb
   Set RS = DB.OpenRecordset(SQL)
 
   Me.Text1.Value = RS.Fields("Field1")
   Me.Text2.Value = RS.Fields("Field2")
   RS.Close
   Set DB = Nothing
 
End Sub

try changing to this

"SELECT * FROM tblTest WHERE [Field1] = '" & frmTest.Text3 & "'"