Dear Amaury,thanks for advice again,I do not have the right to remove company's labview or flexmotion 6C software, the only thing for sure is when I initialize and test under MAX, it was ok.Could it be the missing flexmotion VI library? as when I open the library, there were only two folders; Borland and visual. The manual says there is a separate flexmotion VI package includes a complete motion VI library,with examples, for use with LABVIEW, is this a separate item not come together when purchase the controller?