Using your Dream Host Control Panel is the most effective way of alerting support staff to your problem:
As the introduction/informative page to this forum states:
[quote]Please understand that these forums are not routinely checked by DreamHost employees (although we do show up from time to time!), and are not meant as a replacement for the KBase or support form. While a great way to receive help and insight from other DreamHost customers, you should use the above options if you need a fast or official response.