Are you requesting and receiving an adventure? The group leader needs to talk to a NPC in the camps to get the adventure. A window will pop-up on everyone's screen describing the adventure upon the leader accepting it.
Also, if you think you are doing all of the steps correctly, exit out of EQ and run the patch again, doing the following:
1. Disable autoplay.
2. Click the advanced button.
3. Make sure all the expansions that you own have a check beside them.
4. Save and get back to the download window.
5. Hit download.
If this doesn't work, then you might want to do the complete file scan from the patch window.