Redoing an asp site in php / html / css

Hope someone can help out with this.

I've basically inherited a site that was done in .aspx - not really something I have any great knowledge or experience of.

Its not actually that big a site, so the asp is only really coming in remotely handy on a couple of pages.

So I've been recreating it in HTML / CSS and am just about at the stage where I want to upload all the new pages.

I created a /new/ folder to test it all out, but when I browse to a new URL, I'm not seeing anything.

For the settings in DW, I was supplied with a IP address as the root folder and FTP host.

And on when I connect to the server, I can see a folder where the files are uploading too OK.

And when I've edited the existing index.aspx page, I've seen the changes appear correctly.

But when I upload any new page, even though I can see it in the correct folder on the server, I can't browse to it - just getting a 404.

I even saved the index.aspx page as test.aspx, uploaded that, saw it in the correct location, but still couldn't see it....

Any clue as to what is going on here? It all looks as though files are being uploaded to the correct location, so I'm wondering if there's some weird aspx thing going on that is controlling what pages can and can't be seen.