unable to change VPN credentials

[AC Question]

Hi there! After creating the VPN connection i accidently typed in the incorrect credentials and selected save. I removed the VPN entry as it does not allow me to re-enter my credentials. So i restarted the note7 and re-created the VPN entry. i hit connect but it does not prompt for login credentials and goes unsuccessful. any help would be great- id love to be able to connect.