There are a couple of things you could check.
- Open your Carbonite options to the "Reset" page, and choose "Import settings from a character" to import another characters' settings .
- Open your Carbonite options to the "Quest" page, and about half way down the page check the options under the "Quest map options" heading.
- On your Quest Watch window header, please make sure the first radio button from the left is bright green. That shows the quests on the map.
From the Carbonite "ReadMe":
"Quest Watch List
The watch window is draggable but not sizeable. It grows and shrinks as needed based on the quests you are currently watching. The Watch window can be made into a sizeable scrolling list if "Use fixed size list" is checked in the Quest Watch page of the Options window.
The green button toggles if all watched quests will be shown on the map and is on by default.
The purple "Auto Track" button will target the highest priority quest objective and updates dynamically as you move. Priority is based on distance, quest level and if the quest is complete.
The yellow/blue "Quest Givers" button shows Quest Giver icons on the map. Normal ones are shown as parchment icons. Daily quest givers as blue ! icons.
Button colors:
Dark yellow = No givers
Yellow = Quest givers and daily givers
Blue = Daily givers
The white "Show Party Quests" button determines if quests from other party members with Carbonite will also be shown in the Watch List."
I hope this helps.