topr8 - 9:01 am on Mar 1, 2013 (gmt 0)
well i assume you have set up the database on one of the domains, probably the main domain.
how do you connect to this database? using localhost?
are the two sites on the same sever or different?
if different then you might need your hosting company to tell you how or to change some permissions (if they will)
if the same you should just be able to connect to it no problem using the same wmethod that you do already fromt eh first site.