cannot access from proxy

 
Hello,

I am trying to access the data server behind a proxy from Ghostsurf software.
http://www.tenebril.com/products/ghostsurf/pcc.html

I have written in the proxy settings of Metatrader 127.0.0.1:2712
but a message says the proxy is not valid.
Other browser ( IE , Mozilla are working perfectly from behind the proxy) and Metratrader works perfectly also when I disconnect the proxy.
Should I change some other settings ?

Than you for your answer.
Regards.