Please help, IIS 6 set up but site not showing!!

Hi Guys
First time here so I hope im in the right place.

Anyway........

I got Broadband this week and decided that I would run my own webserver to host my homepages and my friends sites.

I set up IIS and can view the sites locally with no problems, my ASP cod is all working fine.

My web address is http://www.staffdata.co.uk the site was hosted online but I recently got the addy shifted to ZONE EDITS http://www.zoneedit.com name servers, they offfer a redirection service which points traffic looking for my URL to my PC via my static IP.

I have it all set up with ZONE EDIT and have written to them and they say everything is fine at their end and I should check my firewall and IIS settings.

I have looked through everything and cant see anything wrong.

I can see the sites ok by using the addy in my browser but others just get the old "Page Cannot be displayed" page!!!

I realy do not know what to look for now?? Can anyone suggest what I do to get this going properly?

Many thanks in advance
Les

Might want to check and see if your ISP blocks port 80. I had the same problem, and finally had to setup my router to accept connections on another port and then forward it to my PC.