Need help to config

[33]

Hello Guys, I'm new in here and I want to try to learn how to make configs in silverbullet...so I build one and test it....it work fine without proxy it give me all I want but when I activate the proxy check box it give me this annoying error:



Without proxy:

 

I would really appreciate if someone with more experience can pin-point what I do wrong and why I get this error only on proxy. 
Here is the config you can look more deep into problem:
Mediafire

[5.603]

use different proxies

Need custom configs/checkers made?

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[33]

use different proxies

I did try on different proxy and will have the same results...I'm thinking is something else that give me this error...Can you look on my config?