[horde] Auto-Login

[strauberry]

Hi,
I'm using Horde togehter with Cpanel. There's an htaccess-window for logging
into horde. After I logged in through the htaccess-window, I get another
form (html-form) to login in again. All my data are filled in this
form-fields already. Now my question: is it possible to go arround this
login-step? I'd like it this way: login via htaccess and direct display of
my WebMail-Account without any other logins.
Thank you!!
strauberry