It's not Possible to Run Web Client Pro on Older Java Versions - KB Article #2140Related Articles --
After applying Java 7 Update 51, a security warning is issued when you try to enable Web Client Pro. This issue is corrected in RhinoSoft Serv-U version 15.0.0 Hotfix 2. However, if you are running on an earlier version of Java, it is necessary to lower the Java security level to be able to run Web Client Pro.
Perform the following steps to lower the Java security level:
- Open Control Panel > Java.
- Click the Security tab on the Java Control Panel.
- Drag the Security Level slider from High to Medium.
When you've updated to Java 7 Update 51, you can return the security settings to their default and Web Client Pro will continue to function properly.