Try 'print "@INC"' from both the command line and from apache and see if they are different. Check to see if you have 'Parser.so' and 'Parser.bs' under an 'auto' directory in one of those INC directories above (under the site-perl/5.005/sun4-solaris directory probably, and HTML/Parser.pm in the same sun4-solaris directory). Do you have multiple installations of perl or HTML::Parser?