Linq ISingleResult

I have a supplier table with all my suppliers in it. I list them in a gridview. In this gridview, there is a link next to each record to an edit page. Below is the code for the edit page.  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim db As New orderLinqDataContext

Dim q = db.selectSupplierByID(Request.QueryString("id"))
Dim r As New System.Data.DataTable


txtFriend.Text = q(0).friendlyName
txtAdd1.Text = q(0).address1
txtAdd2.Text = q(0).address2
txtAdd3.Text = q(0).address3
txtAdd4.Text = q(0).address4
txtName.Text = q(0).supplierName
txtPhone.Text = q(0).phone
txtFax.Text = q(0).fax
txtPostCode.Text = q(0).postCode
End Sub

 This causes a runtime error. The error is: "The query results cannot be enumerated more than once." and the txtAdd1.text line is highlighted.

How am I supposed to get at the data so I can fill my text boxes this way?

Thanks,