Proxy Problem

Questions
1

What the problem with PROXIES
sometimes they work without problem
and now this is the 4th time he do it with me
i test my config to see if it work good or not before launching the JOB,
after that i see the proxy are stopped working ,
yesterday the same problem, but after that they come back working !
and now he maked it again

SUCCESS 0
FAIL 0
RETRY 9500

WHAT THE PROBLEM
– THE CONFIG IS WORKING GOOD WITHOUT PROBLEM

2

Really? maybe it is some rate limiting or so?
Have you tried to debug it?
Like lowering the ban evasion number on config and then look at the log of a tocheck?