Is a fiduciary entitled to a reasonable attorney's fee under ERISA?

Section 502(g) of ERISA provides that "[i]n any action under this subchapter ... by a participant, beneficiary, or fiduciary, the court in its discretion may allow a reasonable attorney's fee and costs of action to either party." 29 U.S.C. 1132(g). "Fiduciary status ... is not an all or nothing concept.... [A] court must ask whether a person is a fiduciary with respect to the particular activity in question." Maniace v. Commerce Bank, 40 F.3d 264, 267 (8th Cir.1995).