blend problem..

 From:  rayman
2519.3 
michael i´m stuck i hided everything i could think of but it doesnt blend on this shape. it was made from blends.....
Initially I only had 2 curves ... I extruded those deleted the initial curves and blended the edges... then I mirrored the whole thin and blended the mirrored shapes together.
then I madce an offset and I alwas had the initial corners deleted before i wanted to blend those 2 offstes i hid the middle lines but no chance to get them to blend 1
the other shape that I ashow you here works flawlessly..
Peter