no system tray notification when i recieve new message in chat room. and i can't know about new chat messages.
how to fix it ?
Do you mean system tray icon blinking for group chat messages?
yes, blinking. or change the tray icon or something like that.
Check File > Preferences > Notifications > Show new messages in the system tray. It then shows a little paper and pen icon on top of Spark's flame icon when you have unread messages.