ProxyChecker Show Always "not working" IP Result.

I have from one friend one proxy checker code but any of imported proxy is after his results working.
I tried to surf manually in firefox and i’m 100% sure i tried good proxy but somehow this code always terminate with same results “not working”
The app wos made in xojo on windows, i use macosx, but it should be not a problem.
If i can send this small project to someone to test it i will appreciate to know where it is the error.
…also it import the proxy list text to listbox but only first row show IP:Port correctly, the other rows show only port.
Friend told me on his side all works fine, i dont know…
Thanks for help.