Block MM_editAction

The first IF statement and redirect is what I need. It's the Else statement:

If Len(Request.Form(NAME_OF_CAPTCHA_TEXTBOX)) > 0 Then
If UCase(Request.Form(NAME_OF_CAPTCHA_TEXTBOX)) = UCase(Session("CAPTCHA")) Then
Response.Redirect("../Profile1.asp")
Else
Don't allow the form to upload to the db & m_sUserResult = "You typed " & Request.Form(NAME_OF_CAPTCHA_TEXTBOX) & " which was incorrect!"
End If
End If

I can not figure out how to block the MM_editAction (form upload) if the first "if" statement is false.