Sending Contact Information By Email?

I have used the example below in another functioning form. The first form is working fine; however in the second form (using the same code), it indicates that "Name "UsersEmail" is not declared. I been working at this for the last 4 days.

'!!! UPDATE THIS VALUE TO YOUR EMAIL ADDRESS
Const ToAddress As String = "Glenn_Ertel@OnslowCountyNC.gov"
'(1) Create the MailMessage instance
Dim mm As New MailMessage(UsersEmail.Text, ToAddress)
'(2) Assign the MailMessage's properties
Dim CCAddress = UsersEmail.Text
mm.Subject = "REQUEST FORM FOR BID - BidNumber = " + BidNumber.Text + ""
mm.Body += "Bid Number: " + BidNumber.Text