@ahmad
It looks like you're trying to load these characters through the browser's address bar, like "VL8LIKZ7fPQ". Probably you have some problem in the logic of the script.
This is very important bug that already here for more than 1 years (at least what i know) and that need to be resolved asap but somehow the developer dont solve it, this bug make website can detect the bot
the problem is that my queries get asked for captcha instantly after i open BAS, while same query works in my chrome/firefox browsers. it somehow must recognize that its not normal chrome, or something