[Why am I receiving error: Second Life cannot be accessed from this computer?]

I am on my laptop and I have played Second Life on here MOST of the time.  I was even playing it earlier today!  So why am I receiving the error: Login failed.  Second Life cannot be accessed from this computer?  I am on Firestorm, but as stated, I have been on this computer all or most of the time and was even on earlier today. 

 

Please advise.

Thanks.