Based on your size 33 X 66. The main load bearing walls would be supporting the 33 and parallel to the 66.
Sounds like the wall your questioning is perpendicular to the 66, or the rafters are going parallel to this wall in question. Therefore it MIGHT not be load bearing. I would have it professionally checked before I removed it though.
If your not sure, then with the use of king and cripples, install a nice proper dimension beam in the walls place.
There are definately exceptions to the load bearing wall defination, but basically a wall is load bearing if the ceiling rafters are perpendicular to the wall or parallel to the homes walls that support the rafters.