I'm having difficulty redefining the layers of a dyn block that i have inserted in a drawing. I inserted a block in a number of drawings and changed my mind and wanted to change the color of some layers on the block.

I modified the block, reinserted it and redefined the block. Unfortunately the layer colors didn't update? Am I doing something wrong. I have an updated block w/ new colors but I can't redefine the block in the drawings that I inserted the block in w/out doing it manually for each drawing. There's got to be a simpler and more efficient way of doing this.

Help. Please