I have faced same kind of issue before few months. After connecting with Faronics Support they guided me as follows about it:
Make sure the port 7725 is opened up on your Console machine for inbound and outbound traffic across TCP and UDP protocols.
Next make sure you are actually able to ping the workstation from the Console machine and vice versa.
If the icon is disappearing from the workstation, it could be a different issue altogether. If you have an antivirus, exclude the C:\Program Files\Faronics from the real time scanning or protection.
If the issue continues, I would recommend you to get in touch with Faronics Support and they'll simply remote in and assist you with your issue.
Regards, Rubert Cornell