Modules & VBA :: Can Only Click Button Once Per Form Load

I have created a button that works fine however it will only work one click per form load and i cant seem to figure out why.

Code:
Private Sub BntExpired_Click()
Dim QryAllCourses As recordset
Do Until ExpiryDate > Date Or ExpiryDate = ""
MsgBox ([FirstName].Value + " " + [SecondName].Value + "'s course in " + [CourseName].Value + " has expired")
recordset.MoveNext
Loop
Exit_BntExpired_Click:
Exit Sub
Err_BntExpired_Click:
MsgBox Err.Description
Resume Exit_BntExpired_Click
End Sub