Sourdough starter using enriched flour?

So I have been working on a starter for a week and using rye and a all purpose flour (don't know if it's bleached or unbleached) and it worked awesome. So I ran out of the I know white flour and had a bag of co-op brand enriched flour. Last night I tried to get a starter going to bake a loaf today and it didn't activate. Wondering if it could be the flour or maybe another factor?? Zs