Link a subdomain to a domain without changing the name

since i don't know whare to search for the problem that i'm incountering, i'll just explain the situation here.

I have :

1- a linux domain on a server that does not support ASP.NET.

2- another host that support the ASP.NET.

now, all i need to do is when i type my domain name which located in (1) well open the site on (2) with keeping the name.

Here an example:-

www.whatever.com   ---- my domain 1

www.whatever.com/about.aspx  ----- a page on the second domain but with the same name of my domain 1