Antivirus software may be configured to disable dialing. This will cause problems when Fax4Word tries to send a fax.
To stop Panda antivirus from blocking Faxes from being sent:
Open the Panda antivirus program, click "Settings", "Antivirus Protection", "Configure Protection Against Fraud".
Uncheck the box at "Detect attempts to dial unauthorized numbers".
Click on "OK" at the bottom of the screen or the change will not be saved.
Keep answering "Do not remind me again" to the advisory messages and they will eventually stop.