Check you have entered the email address correctly-
Your dial up and email username will be in one of the following formats:
yourname.orangehome.co.uk
yourname.wanadoo.co.uk
yourname.freeserve.co.uk
yourname.fsnet.co.uk
yourname.fsbusiness.co.uk
yourname.fslife.co.uk
yourname.fsworld.co.uk
You chose the 'yourname' segment when you registered with Orange, Wanadoo or Freeserve.
Please note: @fs should not be used in email or webspace settings
I noticed you quoted @fsbusinessetc earlier?