Make sure "Local Activation" is check under the DCOM Configuration for IUSR:
1. Control Panel-->Administrative Tools-->Component Services
2. Go to DCOM Config under My Computer:
3. Right-click on StatSoft WebSTATISTICA Service and select "Properties":
4. Click on the "Security" tab, click the "Edit" button in the "Launch and Activation Permissions" section. Select "IUSR" and check the "Local Activation" under the "Allow" column. Click "OK" twice to save: