Dreamweaver MX 2004 isn't list as a supported version:
Windows
- Windows Vista, Windows XP SP2, or Windows Server 2003
- 128 MB RAM (256 MB recommended)
- Dreamweaver CS4, Dreamweaver CS3, Dreamweaver 8
- Works with static, dynamic or template pages.
Macintosh
- Mac PowerPC or Mac Intel
- MacOS 10.4.x, MacOS 10.5.x
- Dreamweaver CS4, Dreamweaver CS3, Dreamweaver 8
- Works with static, dynamic or template pages.