please help me
i m open one time open 2 skype
1 skype working fine 2 skype open some second after not show on screen
help me
wht problem?
tell me problem and solution

Clarify your problem. Are you saying you opened skype and it worked as expected and the second time you opened it, it did not work as expected or is the problem something else? It would help if you indicated which distribution of Linux you are using.

It's quite hard to understand your question. Before you can get useful answers we'll have to make sure your question is clear. I will try to rewrite your question, please check it and tell us if this is what you wanted to know:

You had Skype installed and working but now you tried to update it and now when you try to run it again the Skype Window disappears after a couple of seconds?
Is that what you are trying to say?

If yes, some more information will be needed:
I am assuming you are using Ubuntu?
How did you install Skype?
And how did you try to update it?
Are you getting any error messages?
Have you tried running Skype from within a console and checking if there is any error output in the console?