501 return code

I have code that posts xml data to a http server (Tomcat).
Which works perfectly with perl 5.6.2, not with perl 5.8.?.
For a work around I have 5.6.2 installed and running the code, but
now I would like to figure out why this is not working with Perl 5.8 .
When I send the request, I get-

  DB<3> x $res
0  HTTP::Response=HASH(0x89a7f78)
   '_content' => "501 Protocol scheme '\cG\c@\cH\c@' is not supported\cJ"

..like I stated earlier, this works with 5.6.2.  I am not sure what has 
changed with Perl 5.8.* and what I need to do different.  Any ideas?


                                 Thanks,
                                     STH
-- 
Scott T. Hildreth <[email protected]>