If you are having issues accessing LOIS - even after you have changed your password - are you (or your device) capitalizing the first letter of your username? LOIS is very sensitive and sees the incorrect case as a different username. Enter your username with all lower-case letters.
Also, the username for LOIS is the short Lesley username, meaning that it is the username without the "@lesley.edu".
If you still can't access LOIS, then please take a screenshot of any error message that you are receiving, and send it to firstname.lastname@example.org. Make sure that you include your name, Lesley username, and student ID number if possible.