Grass cannot grow in extreme shade. Turf grass does not grow naturally in a woods. Grass is a sun plant and needs at least 3-4 hours of sunlight to grow decently. (We don't recommend individual brands anyway.) We assume you were sowing fine fescue seed, which is what is recommended for shade. The brand is not the problem.
In extreme shade, one option is to plant with shade-loving plants, e.g. groundcovers such as ferns, epimedium or Canadian ginger (avoid English ivy like the invasive plague that it is) or create beds or forest-like areas of a mix of shrubs and perennials.
Another option is to use mulch or stepping stones.
You may also be able to reduce the shade by removing some trees or branches.
This link has a list of resources that include shade gardening. http://extension.umd.edu/mg/mg-contacts/handouts