jumping back to login prompt as soon as loged in

[tool]

hi everyone.
First, excuse my english, is poor (i'm from Chile and my first language is Spanish).

I have this problem:

http://www.roundcubeforum.net/3-news-announcements/12-general-discussion/6380-jumping-back-login-prompt-soon-loged.html

the same of "gcclinux". I tried to use some SVN version, and use the solution on this topic and nothing (for default the ipchange is false).

When I login open the webmail page, but in 2 seconds it jumps back to the login page.

Any solutions? please

[tool]

please help

[toetag]

what version PHP?  what mail server are you using?  are there any errors listed in the log file?  are you using any plugins?

[tool]

what version PHP?  what mail server are you using?  are there any errors listed in the log file?  are you using any plugins?

Version de PHP   5.2.9

no errors in the log file and I don't use any plugins.

thank for response