Make sure that you are using the correct username and password. If you have forgotten your password click on the link below the login form to receive a new one. However, please note that any accounts that have been created through a link to an institution's active directory will have to have the password changed by the institution in question. These passwords are not set in the PebblePad software and we are unable to change them. PebblePad Administrators within your university or institution will be able to confirm your username. Check the URL to confirm that you are trying to log into the correct installation of PebblePad.
If you are still experiencing difficulties, contact the IT support at your institution as they will be best placed to identify the cause of the issue.