Could not find mime type, application/octet-stream, error in linux

Hello,
I have a computer with linux, when I want access to an icon I get a message saying could not find the MIME type application / octet-steam How can I remove it ?

This means that the application used to open the file does not exist or is not installed on your computer, what kind of file is it? document, video, audio?

First,
try to run update-mime-database /usr/share/mine. Probably restart your window manager then. Are u using kde? Where/how do you get this message?

I am using KDE.
When I start ay application; kdesktop, image utility, audio application. etc I am getting this message

Did you get this solved? If not you can do this:

$ vim /home/$USER/.kde3.5/share/mimelnk/application/octet-stream.desktop

change:

Hidden=true

to:

Hidden=false