Hi,
First of all, make sure that you have a valid LabVIEW Real-Time license for this operation. Here's the link you can find more info on this.
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/4faf16fabaca2d5c862569ae00732a1b?OpenDocument
Refer to Knowledgebase article linked below for the instructions.
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/3c9dee12967ca51d86256e2e00603a7f?OpenDocument
Regards,
Remzi A.
Applications Engineering
National Instruments