Your virus scanner may detect the lobby as unsafe - this is a false positive and should be reported to the makers of your scanner.

YinYin has provided a list of virus scanner report forms where you can submit the lobby for verification as a false positive.

Mar 29, 2014  Little Fighter 2 Little Fighter 2 is a popular freeware fighting game and the sequel to Little Fighter 1. It was released in 1999. The game supports up to 4 human players on one computer and a total of 8 characters using online play. Little Fighter 2 is a very dynamic fighting game enabling fights of 8 characters in one area, including up to 4 people on one computer. The game offers: 24 (part locked) unique characters (each has unique attacks and combos) single player mode; online gameplay (local or via Internet) controlling with keyboard, joystick or gamepad.

If you are experiencing issues with your virus scanner please visit the following link to report a false positive

Malware or False Positive Report List

Find your vendor and select 'Submit false positive' on the right hand side, fill in the form and send it for review this way a security team can verify that the lobby is safe and prevent their virus scanner from flagging it in the future.

Little Fighter 2.5 Download

This will stop your scanner from deleting the lobby and preventing you from using it.