Can't save HIKA settings for e-mail

Hi
I can't save the changes in the e-Mail templates:

HIKA Admin -> tab system -> Emails
e.g. Order creation notification

Joomla says: You don't have permission to access /administrator/index.php on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

All other settings in HIKA (e.g. Templates Overrides in "View" and other componentes/plugs I can save without this problem.
I don't understand this, because the access rights for den folders and files are still the same as ever.

I did exactly what was described by Jerome here:
www.hikashop.com/en/forum/2-general-talk...ermission.html#68369

But it don't work. I have still the same error when I try to save system -> emails -> one of the e-mail template.

oh, sorry to bad.
now i did it.

view: email
file: form

this combination exists only in backend for the template khepri.

The form tag now is saved as:

<form action="index.php?option=<?php echo HIKASHOP_COMPONENT ?>" method="post" name="adminForm" id="adminForm">

BUT: With the same effect/error when I try to save some text changes of a email template.

Until I get the answer from my provider, I'have to change the email templates now...
Where are these php codes saved in, to change it using FTP, or direkctly in mySQL somewhere in the HIKA Settings?

Text I know I can change as a language file override in HIKA Admin (that part I could save !)
But I have to change also some styles and HTML Code

Indeed, it was the mod_security problem. Now it works after good support from my provider !
They changed some rules in the apache mod_Security.

this was the solution for me too, my host Rochen changed something and now I can edit the emails, so the problem does not come from Hikashop