Can't export blend shapes in maya

MamoruK

So i've finished my animations which include blend shapes  for talking and now i'm exporting them but they won't get picked up by the exporter even though i have the option checked. i constantly get this error when exporting.

The Morph Target object's controlling slider may not have been deleted.

The morph target object : ...  is not available in the scene.

Ignoring this target.

what am i doing wrong here?