关于数据库连接！！的简单问题

Dim dbString As String
Dim db As Database
Dim rs As Recordset
Dim SQL As String
SQL = "SELECT * FROM asa"
dbString = "C:\My Documents\db1.mdb"
Set db = OpenDatabase(dbString)

' Execute the query.
Set rs = db.OpenRecordset(SQL, dbOpenSnapshot)

' Display the results.
Do While rs.BOF
Text1.Text = Text1.Text & vbCrLf & rs(0)
Text1.Text = Text1.Text & vbCrLf & rs(1)
Text1.Text = Text1.Text & vbCrLf & rs(2)
Text1.Text = Text1.Text & vbCrLf & "------------"
Loop

rs.Close
db.Close


如上例子，我要打开db1库，取asa表，然后在文档里头填写（text1），当运行到
【Set rs = db.OpenRecordset(SQL, dbOpenSnapshot)】的时候出现类型不匹配！前面运行都正常，，，请问怎么解决，谢谢