Number Problem

Hey guys, just found this forum today and I have a quick question about phone numbers on the live web shows.

I live in Ireland.
Ok so I call into Babecast on the live show, but they have an Irish number and International number which I can use.

But for all the other sites they only list UK numbers, is there anyway for me to call in? I know that 0044 is the UK calling code but it never works for me, for instance
'0044906*******' and so on.

Thanks for help in advance!

EDIT: Woops sorry I meant to post this in the help section.