can't connect to sieve

[Jesus Ruiz]

Hi i'm trying to connect to sieve, to upload a forwarding scripts, but when 
i put
[root at mail bin]# sieveshell --user=timeus
--realm=acelerate.net<http://acelerate.net>--authname=cyrus
mail.acelerate.net <http://mail.acelerate.net>
connecting to mail.acelerate.net <http://mail.acelerate.net>
Please enter your password: 
Please enter your password: 
Please enter your password: 
Please enter your password: 
unable to connect to server at /usr/bin/sieveshell line 169, <STDIN> line 4.
   But when i try with my other domain
[root at mail bin]# sieveshell --user=jruiz
--realm=acelerate.org<http://acelerate.org>--authname=cyrus
mail.acelerate.org <http://mail.acelerate.org>
connecting to mail.acelerate.org <http://mail.acelerate.org>
Please enter your password: 
> 
 I have no problem.
 Any ideas what can the problem be.
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