i have already log in skype on my computer with a mircosoft account. But it said that it is not able to recognize my skype name or password on my windowsphone(Lumia 900). what is my skype name?
You cannot sign in to the Windows Phone 7 client using a Microsoft Account. You will need to associate the Microsoft Account with a Skype ID and use that Skype ID to sign in on Windows Phone 7. You may or may not need assistance from Customer Support to complete this process.