As I understand it, you have just signed up with a new host (or new domain/site) and that place a standard index.html file on the server telling you to replease it.
You have instead put an index.asp file on the server as your homepage. This is fine, you just need to delete the index.html file. I guess what is happening is that when visiting
www.your-domain.co.uk the robot/spider is being re-driected to
www.your-domain.co.uk/index.html not the index.asp page.
Try deleting the index.html page and see what happens or contact your hosting comapany.
Alex