We have encountered this problem at one customer site, and resolved it by re-installing DATASOCKET V4.0. Please contact us at support@dasylab.net if this does not resolve your problem.
DataSocket is not the way to talk to Excel. You need to use DDE output or ODBC output. We have posted two application notes on the www.dasylab.net web page, under support, describing DDE and ODBC application setup with DASYLab.
Measurement Computing (MCC) has free technical support. Visit
www.mccdaq.com and click on the "Support" tab for all support options, including DASYLab.