Can’t I log in a different computer with my Skype ID.

why do we have problems logging in to Skype from different computers apart from the one we used to open the account?Sometimes, I find it hard to open my account from different computers.Might it be that an IP address of a computer is recorded with a unique sign-up in Skype that causes it not to open when another person with different ID try to access his account? This has been a persistent problem that I need help.
