I'll try running some tests, but since it created the tables, I'm not sure offhand why you would get a blank page. Did you also upload the zipData.sql file to insert zip code information? Does the zipData table have any data in it?
You have to complete step 2-5 in order for Classifieds to work, so lets see what the issue is.
Please do not PM me for support or sales questions. Thank you for your understanding.