As Storm uses the FTPS transfer protocol by default rather than plain FTP there are some settings to be aware of when connecting via FTP in Dreamweaver.
Here are the settings:
Servername: This can be whatever you like
Connect Using: Make sure you select 'ftp over SSL/TLS (explicit encryption)' from the drop down menu
FTP Address: This should be your servers hostname or IP address, for example "yourservername.nh-serv.co.uk"
Username: Your Storm FTP Username
Password: Your Storm FTP Password
Root Directory: Important! Leave this blank
Web URL: Your sites URL
You will also need to make sure that the passive mode check box is ticked.