Proxy method does not work using LWP::UserAgent for HTTPS request

$ua = LWP::UserAgent->new;
$ua->timeout(10);

$ua->proxy('https', 'myproxy.mydomain:8080'); # (B) this

$response = $ua->get($uri);
if ($response->is_success) {
print $response->decoded_content;

die $response->status_line;

use $ua->proxy setting proxy don't work. It gaives following trace.

> I have following sample getting file via HTTPS protocal using
> LWP::UserAgent module.
> #!/usr/bin/perl
> use LWP::UserAgent;
> use LWP::Debug qw(+);
> $uri = $ARGV[0];
> $ua = LWP::UserAgent->new;
> $ua->timeout(10);
> #$ENV = 'myproxy.mydomain:8080'; # (A) this works
> $ua->proxy('https', 'myproxy.mydomain:8080'); # (B) this
> don't works at all
> $response = $ua->get($uri);
> if ($response->is_success) {
> print $response->decoded_content;}
> else {
> die $response->status_line;
> }
> Setting HTTPS_PROXY environment variable works fine, but
> use $ua->proxy setting proxy don't work. It gaives following trace.
> koroke:~/tmp$ https_get.plhttps://www.somedomain.jp/
> LWP::UserAgent::new: ()
> LWP::UserAgent::proxy: https myproxy.mydomain:8080
> LWP::UserAgent::request: ()
> LWP::UserAgent::send_request: GEThttps://www.somedomain.jp/
> LWP::UserAgent::_need_proxy: Proxied to myproxy.mydomain:8080
> LWP::UserAgent::request: Simple response: Not Implemented
> 501 Protocol scheme '' is not supported at https_get.pl line 17.
> Who can explain that's different?
> Thanks.

$ua->proxy('https', 'myproxy.mydomain:8080');

$ua->proxy('https',

> On Sep 9, 3:53 am, shall...@gmail.com wrote:
> I'm not positive this is correct
> but it appears the scheme in
> the actual proxy specification is implicit with ENV but not with
> the 'ua' method call. So,
> $ua->proxy('https', 'myproxy.mydomain:8080');
> according to the UserAgent doc examples, should instead read, eg.,
> $ua->proxy('https',
> 'https://.....');
> --
> Charles DeRykus- $B0zMQ%F%-%9%H$rI=<($7$J$$(B -
> - $B0zMQ%F%-%9%H$rI=<((B -

$ua->proxy('http', 'http://myproxy.mydomain:8080/');

$ua->proxy('https', 'https://myproxy.mydomain:8080/');

$ua->proxy('https', 'http://myproxy.mydomain:8080/');