try 

#!/usr/bin/perlml
use CGI::Carp qw(fatalsToBrowser);
print "content-type: text/plain\n\nTesting";
#use LWP::UserAgent;
use Data::Dumper;
print '<pre>';
print Dumper(\%ENV);
print Dumper(\@INC);
print Dumper(\%INC);
print '</pre>';

[download]
Notice i commented out the lwp use.

if that works then try 
#!/usr/bin/perlml
use CGI::Carp qw(fatalsToBrowser);
use Data::Dumper;
print "content-type: text/plain\n\nTesting";
print '<pre>';

eval {require LWP::UserAgent; } ; 
print 'possible require ERROR:'.$@."\n" if ($@); 

eval {require x::x; } ;
print 'possible require ERROR:'.$@."\n" if ($@); 

print Dumper(\%ENV);
print Dumper(\@INC);
print Dumper(\%INC);
print '</pre>';

[download]
notice the change to a require in an eval. and x::x to prove it does fail right.

edit: dayum forgot "use Data::Dumper;"

In reply to Re^3: GD and LWP giving 500 errors by huck
in thread GD and LWP giving 500 errors by Schmunzie

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.