The Write Data module is disabled in the Demo versions of the software. Click on the Help About, and look at the User Information tab to see if you are running a licensed version. If you are, then you should contact your reseller to determine the problem. If it is a demo, then you will need to purchase a license to activate all of the features.
Note, Version 6 is very old. We are currently shipping Version 9. See
www.dasylab.com for details.
Measurement Computing (MCC) has free technical support. Visit
www.mccdaq.com and click on the "Support" tab for all support options, including DASYLab.