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Did you put down localhost for database name, with the correct database username, database name and database user password that you get from looking in your control panel for MySQL for the database you created there for xoops?
Because the only thing I can see that could be the problem with your installation because of what you say is the last screen you're on before getting a blank page, is that you don't have the right info typed in for the database name, or the database username or the password.
Something is wrong in that. Or you didn't create the database in MySQL on your server first. Everything that you typed in before this last page is just storing the information you typed in but when you click on next in confirm database settings you get the error. That means your database settings are wrong or you didn't create the MySQL database to put XOOPS in before trying to install xoops.