problem publishing my iWeb site to new server

I have a problem publishing my site to a new server HostGator.

I click publish, everything continues normally, then I get an ERROR notice:

Publish Error

There was an error communicating with the FTP server.

Try again later, or check with your service provider

Since I changed the settings for the new server all the iWeb pages symbols go pink every time I close and reopen iWeb. Once I have tried to publish and get the ERROR notice I see that most of the pages have turned blue (suggesting they have been correctly published) and the same 5 pages remain pink (suggesting they have not been published) I have used the HostGator link

http://gator694.hostgator.com/~carouge1/carouge-art/Welcome.html

to look at the uploaded pages.

All the pages are on their server file BUT the pages which remain pink on iWeb have problems. These problems (missing photos etc.) don't seem to affect the pages when the site is called up normally. The site is apparently still being uploaded to people’s computers through MobileMe eventhough I have changed the server settings! So I’m assuming the page problems will show up after MobileMe stops at the end of this month? I cannot find an explanation for the failed pages from HostGator or from the Apple online answers.

Grateful for any advice.