Please check the following:

• Is the port and address correct?

• Did you recently change the server port? If the new firewall rule could not be created, VisualCron automatically rolls back to the previous port. Verify the current port in Server > Main settings > Settings and check that the corresponding Windows Firewall rule exists.

• Open the Windows Control Panel -> Administrative Tools -> Services. In the list of services, locate VisualCron Service. Is the "VisualCron Service" started?

Open the log file server_startup.txt. If it contains:

ComService() exception (System.ArgumentException: It is likely that certificate 'CN=vc' may not have a private key that is capable of key exchange or the process may not have access rights for the private key.

Perform these steps:

1. Stop the VC server
2. Go to VisualCron installation folder
3. Start VisualCronService.exe manually right clicking on that and choose Run as->Administrator
4. Click on Delete Certificates button
5. Click on the Create Certificates button
6. Exit application
7. Start VisualCron service
8. Try to connect again