[exim] PROBLEM WITH FROZEN MESSAGES! HELP!!

Last week I had this on my /etc/exim.conf

#auto_thaw = 6d (this line is commented)
ignore_bounce_errors_after = 1d
timeout_frozen_after = 4d

The rules where working fine.

and I changed the values to:

#auto_thaw = 6d (this line is commented)
ignore_bounce_errors_after = 30m
timeout_frozen_after = 1d

I restarted exim but it´s still applying the old values for 1d and 4d !!!
Why is happening this?? Do I have to restart something else??

Help will be appreciated!