Multires questionq

Alright, this is my last resort. I have two meshes, one with a multires modifier active, and another with a multires modifier applied. They both came from the exactsame base mesh. When I attempt a reshape on the same multires level as the highres mesh was when the modifier was applied, it says that the vertex count does not match. Is there a way around this, or do i have to start over again?

I don’t get it, two meshes, and one object? How did you do that? When you apply modifier, it applies it to all meshes.