Functionality Locked: Please Validate Your Internet Connection
Updated on: June 29, 2026
Issue
You saw the following error message when attempting to install F/X CAD:
Functionality locked
Please validate your Internet connection.
Cause
This error message can result from any of the following issues:
- A bad Internet connection
- One or more of the following items preventing Land F/X from communicating with our servers:
- A firewall
- Antivirus software
- Strict folder permissions
- The F/X CAD executable (acad.exe) possibly being blocked
Solution
1. Verify that your computer is connected to the Internet.
2. Verify your firewall and security settings, ensuring that a firewall, antivirus program, or strict folder permissions are not blocking Land F/X from communicating with our servers.
3. Verify that the F/X CAD executable (acad.exe) is also not being blocked. You may need to create an exception for the entire install dir for F/X CAD.