[PHPUnit] installation problems

I hope someone can help out a noob here. I'm having problems installing PHPUnit2. I've got PHP5 installed on Fedora Core 4. php -v returns: PHP 5.0.4 (cli) (built: Nov 8 2005 08:27:11) Copyright (c) 1997-2004 The PHP Group Zend Engine v2.0.4-dev, Copyright (c) 1998-2004 Zend Technologies

       with Zend Extension Manager v1.0.9, Copyright (c) 2003-2006, by

Zend Technologies

       with Zend Optimizer v2.6.1, Copyright (c) 1998-2006, by Zend

Technologies

       with Zend Debugger v5.1.0, Copyright (c) 1999-2006, by Zend

Technologies pear list returns: Installed packages: ===================

Package              Version State
Archive_Tar          1.1     stable
Benchmark            1.2.6   stable
Console_Getopt       1.2     stable
DB                   1.7.6   stable
HTML_Template_IT     1.1     stable
HTTP                 1.3.5   stable
Mail                 1.1.4   stable
Net_SMTP             1.2.6   stable
Net_Socket           1.0.6   stable

Net_UserAgent_Detect 2.0.1 stable

PEAR                 1.3.5   stable
XML_Parser           1.2.6   stable
XML_RPC              1.4.0   stable

When I try pear install PHPUnit2, I get: downloading PHPUnit2-2.3.5.tgz ... Starting to download PHPUnit2-2.3.5.tgz (43,243 bytes) ............done: 43,243 bytes 'dom' PHP extension is not installed PHPUnit2: Dependencies failed When I try solve the dependency by pear install dom, I get: No releases found for package 'dom' Can someone tell me what I'm doing wrong? Thanks, Jared