Undefined variables

[Viper-SC]

I'm trying to set up YaBBSE on my computer.
I'm running WinXP
Apache 1.3.22
PHP 4.1.1
MySQL 3.23.47

When I go to the install.php page, it says this:
Warning: Undefined variable: step in c:\apache\htdocs\install.php on line 25

Safe Mode Check:
It appears that safe mode has been disabled. You may continue.

If I continue and Install...it installs the files, but at the bottom it says:
Warning: Undefined offset: 1 in c:\apache\htdocs\install.php on line 85

When I continue further...I get tons these warnings:
Warning: Undefined variable: count in c:\apache\htdocs\install.php on line 218

Anyone know what I might be doing wrong?

[Viper-SC]

Fixed the problem. Edited the php.ini file like it said Here

Thanx tarch