[TYPO3-english] Proxy and EM debugging

[Patrick Gaumond]

Using XAMPP Windows and TYPO3 6.2.2 and working behind a proxy (let's say 123.44.55.6:8080)

Using a Windows port of wget it works:
wget.exe -e http_proxy=123.44.55.6:8080 http://repositories.typo3.org/mirrors.xml.gz

In Install Tool I got:
'curlUse' => '1',
and
'HTTP' => array(
        'adapter' => 'socket',
        'proxy_host' => 'http://123.44.55.6',    (Note: jAlso tried without  "http://")
        'proxy_port' => '8080',
        'ssl_verify_host' => '0',
    ),

Using Extension Manager I get:
Update Extension List Could not access remote resource http://repositories....mirrors.xml.gz.

Or using "Get preconfigure distribution" I end up with "Uncaught TYPO3 exception: "1342635425: Could not access remote resource http://repositories....mirrors.xml.gz." 
 
I even tried using non-TYPO3 code (found here http://www.oooff.com/php-affiliate-seo-blog/php-automation-coding/easy-php-proxy-checker-writing-tutorial/ ) to see if PHP setup was ok and the proposed code worked.

There's no PHP error nor Apache error in their respective logs.

Anyone has an idea to help me debug this ?

Patrick