We review evidentiary rulings for an abuse of discretion, according such decisions "substantial deference." Gagnon v. Sprint Corp., 284 F.3d 839, 856 (8th Cir.), cert. denied, ___ U.S. ___, 123 S.Ct. 485, 154 L.Ed.2d 396 and ___ U.S. ___, 123 S.Ct. 491, 154 L.Ed.2d 420 (2002). In her proffered testimony, Ms. Werner stated that on Saturday, December 4, 1999, Fran Brown telephoned her and attempted to recruit her to join PrePaid Legal. (Trial Tr. at 58, May 3, 2001.)