Working fine for me in Dublin city centre so I don't think that there's a general network issue/outage.
Where are you located?
Are you sure that your internet settings are still correct?
Maybe delete them and start from scratch and see if that helps.
http://community.48months.ie/t5/The-Knowledgebase/My-Internet-is-not-working/ta-p/45928
If not then you'll probably have to contact 48 support - see the link in my signature below.
Hope this helps.
