I am not receiving messages from my Windows Outlook contacts in Skype. I access Skype through the Skype app on my Samsung Galaxy tablet and through Skype on my laptop, and both have continuously failed in receiving messages.

I only get the messages when I log into Outlook, and even then I am not sure if they all come through to me. 

I have never had this problem before with Windows Live Messenger, and if I did, it never happened as often as this.

Why is this happening? Is there anything I can do to fix this?