dovecot - Oct 2010 - Virtual Folders

I have the following setup:

dovecot --version
1.2.10

namespace private {
   prefix = virtual.
   separator = .
   location = virtual:~/Maildir/virtual:INDEX=MEMORY
}

protocol imap {
mail_plugins = quota imap_quota fts fts_solr antispam virtual


#pwd
~/Maildir/virtual/all

#cat dovecot-virtual
*
all

The problem is that I can't access any of the virtual folders. Logging  
the IMAP conversation showed me this:


5ptq SELECT "virtual.all"
frdv IDLE
5ptq NO Mailbox doesn't exist: all (all)^M
+ idling^M
frdv OK Idle completed.^M

What am I doing wrong ?

On 5.10.2010, at 3.39, qmail at top-consulting.net wrote:
> #cat dovecot-virtual
> *
> all
..
> 5ptq NO Mailbox doesn't exist: all (all)^M
It's trying to open a mailbox called "all". Put a space character
before it in the file so Dovecot treats it as a search rule.