Link to other site problem

On my site http://www.firecheckapplications.co.uk I created a page which just has a link to http://www.fireservice.co.uk.
If I go on my site and click on it I get the 404 error. When I look at bottom of Firefox window I can see my servers http address http://www.firecheckapplications.co.uk followed by the http://www.fireservice .co.uk one. Am I missing an instruction here. It should just go to the fireservice link I created.
Any help appreciated,
Michael