Problem installing Orca Module

Everything works great so far, no problems, installed the Modules except for one, it won't install and I get this message:  Does anyone know what I need to do to make this work?

Orca requres PHP XSLT extension. Please enable it first then proceed with installation.

For PHP4, make sure that PHP is compiled with the following extensions:

                    --with-dom --enable-xslt --with-xslt-sablot 

                    DOM/XML: enabled
                    XSLT support: enabled

                    --with-xsl 

                    XSLT support: enabled

please send this text to your host

What you are seeing is the error in the admin panel when trying to activate Orca. Did you take a look at the Host panel Dolphin Admin Panel. My guess is that this is not installed on your server. If you look at the php configuration in you admin it will tell if installed or not. Go to TOOLS and look under phpinfo you should find this, and all of the pear modules that are installed.

xsl

Thanks for the replies, I sent the error to the hosting techs and they ended up reconfiguring the php for me, then it worked perfectly.