center:/home/mesut# dpkg -P -forge-depends gforge-ldap-openldap
dpkg: conflicting actions --field and --purge

Type dpkg --help for help about installing and deinstalling packages [*];
Use `dselect' or `aptitude' for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;
Type dpkg --license for copyright license and lack of warranty (GNU GPL) [*].

Options marked [*] produce a lot of output - pipe it through `less' or `more' !
center:/home/mesut# dpkg -P gforge-ldap-openldap
(Reading database ... 160472 files and directories currently installed.)
Removing gforge-ldap-openldap ...
grep: /etc/ldap/slapd.conf: Böyle bir dosya ya da dizin yok
/usr/lib/gforge/bin/install-ldap.sh: line 1: slappasswd: command not found
dpkg: error processing gforge-ldap-openldap (--purge):
 subprocess pre-removal script returned error exit status 127
Errors were encountered while processing:
 gforge-ldap-openldap