I think I would try to find a different math program that she might enjoy. I've heard Aleks is pretty boring even for mathy-kids, so maybe it's just too tedious? None of my kids liked it, at any rate. What about switching it up with something like Life of Fred, which is more of an enrichment that a curriculum?
AoPS is very challenging and I don't think I'd have a child who doesn't like math do it. My son is very mathy, but even he gets frustrated with the AoPS challenge problems at times. Before starting it, I would have her take their assessment.
