conflict packages bery with another aplications

Binary package hint: synaptic

When I try to install Beryl in Aplications appear this words:
"This application conflicts with other installed software. To install 'beryl-manager' the conflicting software must be removed first.

Switch to the 'synaptic' package manager to resolve this conflict."

ProblemType: Bug
Architecture: i386
Date: Thu Jul 19 17:13:14 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/sbin/synaptic
Package: synaptic 0.57.11.1ubuntu14
PackageArchitecture: i386
ProcCmdline: /usr/sbin/synaptic
ProcCwd: /home/rafaelwrossi
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: synaptic
Uname: Linux Linux 2.6.20-16-generic #2 SMP Thu Jun 7 20:19:32 UTC 2007 i686 GNU/Linux