i have problem with blank page too:) i started to install XOOPS according to this install wizard on http://wiki.xoops.org/wakka.php?wakka=InstallGuide
everything was ok until the page 'confirm database settings'.
after that I can see only blank page with source: .
I have debian woody apache server 1.3.26, MySQL 3.23.49 and php 4.
ofcourse I had everywhere green lights during instalation.
I've also tried some of this tricks on http://wiki.xoops.org/wakka.php?wakka=TroubleshootingBlankPage
but it didn't help.
can somebody help me with this problem?

Your problem is likely that MySQL was not compiled into PHP or was miscompiled. Check your phpinfo to make sure - you should have a table section on MySQL in phpinfo. If there is none, then you need to recompile php with MySQL or re-install the mysql-php binary.

i've installed php4-mysql package and now it's ok:) thanks