I just finsihed doing the exact same thing you are discussing. I did the web testing exactly as Shonky suggested. Your message seems to indicate an issue importing the tables though, and this would be on the mysql host.
First, I didn’t have problems accessing my new mysqlhost name as long as I started phpMyAdmin from my dreamhost panel. Second, your mysql hostnames all actually point to the same location, so you could connect to the host using a different hostname (from an existing domain) and just connect to the desired database from there.
find/offer services free
Codes:THNMax ($97) THNMaxHDD (+100%) THNMaxBW (+100% txfr) THNMaxDomains (5 free) THNBalance (20% HD&BW, 1 Domain+IP +$16)