Maildir.c error

Greetings,

I am trying to get sqwebmail up and running on a Linux box with Apache and 
Qmail installed.  I am not using Courier and do not have need for IMAP or 
LDAP.  I am using PAM authentication.

After successful compilation I receive the following message after 
attempting to login:

"Internal error (module maildir.c, line 170) - contact system administrator"

This is the problem code segment in maildir.c:

    if (maildir_info_imap_find(&minfo, foldername, sqwebmail_mailboxid)<0)
       enomem();

Here is my current configure string:

./configure --prefix=/usr/local/share/sqwebmail 
--with-cachedir=/var/cache/sqwebmail --enable-imageurl=/webmail 
--enable-imagedir=/var/www/html/webmail 
--enable-cgibindir=/var/www/cgi-bin/sqwebmail --disable-changepass 
--without-gzip --enable-autopurge=1 --enable-maxpurge=7 --without-ispell 
--without-authmysql --without-authpgsql --without-authldap 
--without-authvchkpw --without-authuserdb --disable-utf7-folder-encoding

I am seeing sqwebmail create the .Drafts directory and the 
sqwebmail-ip  sqwebmail-timestamp files.

If anyone has experience with this error, or any suggestions, I would 
greatly appreciate any help.

Thanks