Correct a red color resulting from semi-permanent dye?

Two days ago I dyed my hair (naturally medium brown but highlighted blonde) with a "warm" brown semi-permanent dye. It turned very coppery red. I want to do an ash brown now to cover it. Do you think this will work? How soon can I try another semi-permanent dye over it without severly damaging my hair?

Also, the boxes say not to use if you have used metallic dyes - how do I know if I have? I only had professional highlights in before the semi-permanent dye.

Has anyone seen the Clairol Brass Free line yet? I'm thinking of trying that over top (if I can find it).