6537 driver problem

Hi All,

Sorry to bother. I have a DAQ6537, which works well in last week. But it does not work now.

I checked it on MAX. It is shown in following image (Red box). As my known, the left logo should be green if everything works.

Does anyone know it is hardware problem or software driver problem? 

BTW: I set it up in TWO computers, with the same problem.

Thanks

Liang