PAYE service unavailable

Hi all,
Hope you will be able to help me in this matter. I have tried to log in to PAYE system several times since Wednesday and always get the message: The Revenue On-Line Service is temporarily unavailable. Please try again later. Thank you.
I could understand one or two times but not every time I try to use it. I also tried to log in yesterday when I was at work and there was no problem at all. Could anyone tell me why? Is something wrong with my internet or something?
Thanks for any advise!!!

Hi - I think it can be a bit hit and miss. I have encountered this a few times myself and simply try again the following day and it usually works (I use same PC so I doubt if the issue is with your internet connection). I suspect the Revenue may be working on the website behind the scenes. Cheers