ftp connection via http proxy error
                Hello, so i'm trying to upload files in ftp server using http proxy, but it returns an error : 
"Proxy request failed.cant connect through proxy server HTTP/1.1 502 Proxy Error <The specified SSL port is not allowed. Forefront TMG is not congigured to allow Sql request from this port>" .
Is there any way to bypass it? I cant change neither proxy's port, nor server. I've read the FAQ, havent find any useful info.
            
        "Proxy request failed.cant connect through proxy server HTTP/1.1 502 Proxy Error <The specified SSL port is not allowed. Forefront TMG is not congigured to allow Sql request from this port>" .
Is there any way to bypass it? I cant change neither proxy's port, nor server. I've read the FAQ, havent find any useful info.