c# - Error when using Symbol/Motorola Fusion dll - WinCE 6.0 -

when run project visual studio, works excellent (on motorola mc 3190 - wince 6.0)

however, when install , run application on device, error:

no compatible fusioninterface dll found, expected version 4.1.0.1 or higher version having format 4.x.x.x

what problem?

in case, deploying symbol.fusion.dll , fusioninterface.dll files in same directory executable has resolved error.