The ritual question with XML::DOM is... which version are you running? The latest one (in libxml-enno 1.05), works with XML::Parser 2.30 (is this the one you have?) and with the shared version of expat that you can download from sourceforge (http://sourceforge.net/projects/expat/), which is the one you have.

If you have downloaded the "stand-alone" version of XML::DOM, that can still be found on CPAN (1.25) then you can get it to work with XML::Parser 2.27 and under (which includes expat, and then if you are using apache it's another can of worms...).

So the problem might be that you are using the stand-alone version of the module.

That said the CPAN Testers results for libxml-enno are not really encouraging!