i dont recieve the sound that notifies me when someone begin a new chat with me,how can i fix this?

Are you looking to find out when someone OPENS a conversation window with you or sends you a message. If it is the first one this isn't possible in Plus!. There is a script that will do something similar however with the way the protocol is even the transfer of a display picture is classified as an open session (open conversation if you will).

when some one opens a chat conversatione with me his name begins to light on and of,but first i must hear a guik sound that notifies me that i sighned in or conversation started or even if some one is cointiuing a conversation with me,it`s the standered sound of massenger,i used to have it,but i messed up the settings some how and i cant fix it back