Problems with login in Admin

[nac78]

I installed Presta today and I trying to set up my shop, but the thing is that I can't use the Admin panel without having to login everytime I press some of its buttons. Also if I do any change after pressing Save the login page shows up.

At first I thought it could be related with my use of Opera somehow, but I tested it on Firefox and Safari and still does the same thing.

Here some facts about my install:
- I have my Presta under a /shop folder
- The site root is password protected (but I tryied without it and it does the same)
- register_globals was OFF since before the installation

I did the installation twice but it didn't help.

Any suggestions/instructions to solve this will be very appreciated!

[kdk]

Cookies enabled?

[nac78]

Cookies are enables in Opera, Firefox and Safari.
Previously I also installed Magento and Zen Cart to the same folder and I didn't have any problems like this on their admin panels, they worked fine.
I like Prestashop a lot, but this thing makes me crazy.

[nac78]

Is definitely something to do with sessions, because everything worked fine in installation.
My host server filled all the required PHP configurations during installation but now that I check the Presta wiki instructions on this page
http://www.prestashop.com/wiki/System_administrator_guide/#Safe_Mode_configuration

and my phpinfo.php tells me this:

safe_mode Off Off
safe_mode_exec_dir no value no value
safe_mode_gid Off Off
safe_mode_include_dir no value no value

Could this affect on the way sessions works in the admin panel?

The admin has been tested on MacOS/Win with Opera, Firefox and Safari and IE

[nac78]

Did anybody else have problems with Back Office redirecting to login all the time?
I really want to get this problem solved, because everything else is working fine!

I found this bug but still don't know if it was solved or not, surprisingly I'm using the
same hosting as this guys..

http://www.prestashop.com/bug_tracker/view/3539/

is it then a Prestashop problem or hosting problem?

[nac78]

I contacted my host, and the reason for this problem is the use of clustered/grid hosting. Prestashop has been coded in a way is not supported by this techonology.

Anyway they said that it is possible to fix this setting the sessions to be saved eg. in my root directory.
So I know that I can set this in my php.ini file, but where else I have to change the path to session directory
in order to have everything working fine in both Front Office and Back Office?

I'll really appreciate your help on this.

[eddi]

Here is the solution:
http://php.dtbaker.com.au/post/prestashop.html

Simple fix.

In the file "prestashop/classes/Cookie.php" go down to line 50 where you see:

$this->_expire = isset($expire) ? intval($expire) : (time() + 1728000);
and change it too:

$this->_expire = isset($expire) ? intval($expire) : (time() + 3600);
This is because (some versions of) Internet Explorer seem to reject cookies that have large expiry times.