Board Thread:ROBLOX help and discussion/@comment-5883141-20140505133200/@comment-5597060-20140507145753

The only thing I can really say is try a new browser, check to see if a extension is interfering with it. Does it have www1.roblox.com  instead of just www.roblox.com? Have you updated all your extensions, browsers, and plugins (including flash player) Did you get any viruses lately? (Because I know that some worms and viruses interfere with the advanced HTML/C++ assets/scripts which includes login; this usually makes it so the login does not recognize your command)