Whenever I am opening any file with MPlayer, the file is opening but I am also getting the following error message:

AO:[pulse]Failed to connect to server: Invalid Argument

Also there is this circular red disk like symbol besides the error message, with a white hyphen-like thing in it.....

When I am opening any music file with Rhythmbox, I am getting the same 'red' symbol besides the songs in the playlist and I am not able to play any song..