same here bro..can't advance anymore ..I even can't trigger the night scene after giving maria the package :/
If you talk about the package of the first mission when she sends you to terracota, here is the way you need to follow (this mini walktrhough was posted by DuDraig):
Start Rachel Quest until the point Maria catchs you in the alley with her.
The next day Maria tell's you to pickup a package from Terracott in New Neighborhood, you dont have your keys Maria gives you hers, go to weapon store make a copy of her keys then go to Terracotta.
After you returned home and give her the package you go to school. Go to Marias room take a copy of your room key check Maria's laptop press ok when ask for password, at 19:00 hours go to family room check Maria's Laptop (left side) get the password.
Next day morning go to Maria's room check laptop read the diary, go to school she tell you you are grounded, after school do the chore she gave you. (Weekend nothin to do) If you cheat for money go to New Neighborhood and purchase from computer store games to increace reputation.
Continue to do chores until Maria take's you to her sister house enjoy.
Next day morning look Maria's laptop, after shool go straight home and the family room see the scene, at night 24:00 hours watch tv she comes to watch tv with you, after that go upstairs look the scene, Aunt calls you and invites you for dance (be patient after her dance it take some time to see the next dialog), then you go home with aunt enjoy.
Next Morning check Maria's laptop, go to school (info personally I start Beth's reccess quest from day 1), after school at 23:00 hours go and watch TV see the scene, when you go to sleep Maria visit you. Saturday at 19:00 go to family room from the right door see the scene, go to sleep and she visit's you again. Sunday at 19:00 hours play console in your room enjoy the scene. Next day before going to school check Maria's laptop, go to school, at 19:00 hours go to Maria's room enjoy.
But you couldn't advance so much more from that point bro, for the bug that i expose in the past reply :/