Which hosting companies support Dreamweaver?

I guess you can't expect any hosting company to sort out poorly written html/css etc, not that DW is party to that, it's the operator who usually mangles the code up and then expects the hosting compnay to sort it out.

It would be better to inform the forum what issues you are having?

Dreamweaver does seem to have some issues connecting to some ftp hosting servers, might that be the issue? I would always advise anyone to use a dedicated ftp client if the inbuilt one is causing issues, perhaps you have another issue/s, not relating to ftp?

Maybe if you could elaborate on the problems you are experiencing, someone might be able to provide some more useful advice.

Dreamweaver is web building software.  Nobody except Adobe supports Dreamweaver. 

If you're asking how to upload files to your hosting server, you need to define your site and enter the correct log-in credentials provided to you by your web host.

Go to Site > New Site. See screenshot.

Failing that, try uploading files with free FileZilla FTP client.

If FileZilla fails to upload files, then you have other problems unrelated to Dreamweaver.