Just to make sure, you say that you are having difficulty with the icon. Thus I am assuming it is just the icon, but if it is more than that like perhaps you cannot get your computer to interface with the internet, please let us know. The suggestions above are good ones, and not knowing what desktop environment or program's icon you are talking about is going to hinder us in helping you to get the icon working because we will be guessing. Feel free to give us any more information that you can think of that is even remotely connected to your dilemma. Afterall, sometimes the least important issue (in your opinion) is the one that will make the difference. Please let us know what Desktop Environment or Window Manager you are using so that we can help you more than guess.
If your using your computer to post here, that is good but no one will be able to give you solid assistance without knowing more information. Good Luck and I look forward to helping you get the icon functioning properly.