If you can't login, please do the following :
1- Request a new pass , and try again
2- Respect lower/upper case and special characters
3- If it still doesn't work, it's probably because your username contains a special character. If this happens, use your email address instead.
If for some unknown reason you still have troubles logging in, contact us , and include a copy the email received from UT (the last one, if you requested a new pass more than once) in your message.