Software⏱️ 4 min read📅 2026-06-19

How to Fix: Unable to connect to Adobe Connect: "ERROR: FMS Server did not return correctly!"

Adobe Connect connectivity issues with Norton 360 antivirus software.

Quick Answer: Try disabling Norton 360's firewall and antivirus features to see if it resolves the issue.

📋 Table of Contents

  1. 🔍 Why This Happens
  2. 🛠️ Step-by-Step Verified Fixes
  3. 💡 Conclusion

The error 'ERROR: FMS Server did not return correctly!' is encountered when attempting to connect to Adobe Connect. This issue affects users who are unable to establish a connection to the Adobe Connect server, despite being able to connect to other websites and applications.

This frustration can be attributed to the fact that the user has successfully connected on multiple computers with different operating systems and antivirus software. However, this knowledge will help us narrow down the possible causes of the issue.

🔍 Why This Happens

  • The primary reason for this error is a misconfigured Windows Firewall or Norton 360 settings that restrict access to Adobe Connect's port 1935. This can occur when the user's antivirus software is set to block incoming connections on this specific port, preventing Adobe Connect from establishing a connection with the FMS server.
  • An alternative cause could be a conflict between other applications running on the system and Adobe Connect's use of port 1935. However, given that other ports are accessible, it is likely that the issue lies with the Windows Firewall or Norton 360 settings.

🛠️ Step-by-Step Verified Fixes

Configuring Windows Firewall and Norton 360

  1. Step 1: Step 1: Open the Windows Firewall with Advanced Security console. This can be done by typing 'wf.msc' in the Run dialog box (Windows key + R).
  2. Step 2: Step 2: In the Windows Firewall with Advanced Security console, navigate to the 'Inbound Rules' section and find the rule that corresponds to Adobe Connect's port 1935.
  3. Step 3: Step 3: Right-click on the rule and select 'Properties'. Then, in the Properties window, click on the 'Advanced' tab and make sure that the 'Profile' field is set to 'Domain', 'Private', or 'Public', depending on your network configuration.
  4. Step 4: Step 4: Also, ensure that the 'Enabled' checkbox is selected. If this rule is not enabled, it may be blocking access to Adobe Connect's port 1935.
  5. Step 5: Step 5: Repeat these steps for Norton 360, if necessary. Open Norton 360 and navigate to the 'Settings' section. Look for the 'Firewall' settings and ensure that the 'Allow connections on port 1935' option is enabled.

Configuring Adobe Connect's firewall exception

  1. Step 1: Step 1: Open Adobe Connect and navigate to the 'Settings' section.
  2. Step 2: Step 2: In the Settings window, click on the 'Firewall' tab.
  3. Step 3: Step 3: Click on the 'Add exception' button and select the rule that corresponds to Adobe Connect's port 1935.
  4. Step 4: Step 4: Ensure that the 'Allow connections on this port' checkbox is selected. This will allow Adobe Connect to bypass the Windows Firewall or Norton 360 restrictions.

💡 Conclusion

By following these steps, you should be able to resolve the issue and connect to Adobe Connect successfully. Remember to restart your computer after making any changes to ensure that the new settings take effect.

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