I'm not familiar with Homesite specifically, but look around in the settings for the host it is uploading to. It will probably be an ftp server. You'll also need the username and password it is using.
Try this to test your ftp and web host:
- Make a simple test image that is not on your site. Call it something simple like test.jpg and save it on your hard drive.
- Open a a command prompt and change to the directory you saved test.jpg in.
- Type "ftp
hostname" where
hostname is the server you got from your Homesite settings. It will then prompt you for the username and password.
- If you get this far without errors good; Basic network and connectivity to your host is working. If not post the errors here.
- Type "bin" and then "put test.jpg" it should upload the file.
- In your browser go to
"http://yoursite/test.jpg" and you should see the image.
If all this works then your network and host are fine and it's Homesite messing up. If not, post your errors and I'll try to help further.