OPIM - override level for elbow and tee

I added a rule in overrides.txt file trying to place elbow and tee in Fittings level instead of defaul Level 1, but it does not work. Here is my rule for it.

RULE
INCLUDE = IE_TYPE=CT_ELBOW || IE_TYPE=CT_FITTING_TEE
LEVEL NAME = Fittings

Please help

Thanks,

Maggie