vb.net เด้ง Error ว่า name 'conn' is not declared. ต้องแก้ยังไงครับ

Imports System.Data
Imports System.Data.SqlClient
Public Class FrmCustomer
    Dim status As String = ""
    Sub loadDataGrid()
        Dim conn As New SqlConnection
        conn.ConnectionString = "Data Source=ASUS\SQLEXPRESS;Initial Catalog='Travel Raft Rent System';Integrated Security=True"
        conn.Open()

        Dim sql As String = "select * from customer"   ''สร้างคิวรี่สตริง
        Dim da As SqlDataAdapter
        Dim DT As New DataTable

        da = New SqlDataAdapter(sql, conn)
        da.Fill(DT)  ''บรรจุข้อมูลที่คิวรี่ลง Datatable
        DataGridView1.DataSource = DT
    End Sub
    Sub enableall()
        CusID.Enabled = True
        CusName.Enabled = True
        CusLname.Enabled = True
        male.Enabled = True
        female.Enabled = True
        CusIDCard.Enabled = True
        CusTel.Enabled = True
        CusAddress.Enabled = True
        CusEmail.Enabled = True
    End Sub

End Class