Hi people,
I have a Zen Cart v1.5.0 site and everything works perfectly except this really-important mod. I spent many days trying to configure it and reading many possible sollutions in this thread, but I still can't configure it correctly. First I had problems setting the cron job at the cPanel, but I asked my hosting provider and they fixed it by writing "curl" just before the root of the file. Since then the cron job seems to work but currencies don't update in the admin. In the email I receive appears the following text:

% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed

100 389 100 389 0 0 7245 0 --:--:-- --:--:-- --:--:-- 7245
100 389 100 389 0 0 7227 0 --:--:-- --:--:-- --:--:-- 0
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>406 Not Acceptable</title>
</head><body>
<h1>Not Acceptable</h1>
<p>An appropriate representation of the requested resource /currency_update.php could not be found on this server.</p>
<p>Additionally, a 404 Not Found
error was encountered while trying to use an ErrorDocument to handle the request.</p>
</body></html>

Does anybody knows what am I doing wrong?
(sorry for my poor english)