Почему не может я устанавливать “ia32-освободить” (никакой кандидат)?

Я хочу установить орла cadsoft 6.2.0 на Ubuntu 11.10, орел - 32 бита, совместимые, таким образом, я должен установить, ia32-освобождает только его предоставление следующей ошибки:

Package ia32-libs is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'ia32-libs' has no installation candidate

после использования команды sudo apt-cache search ia32 Я получил это:

grub-efi - GRand Unified Bootloader, version 2 (dummy package)
grub-efi-ia32 - GRand Unified Bootloader, version 2 (EFI-IA32 version)
grub-efi-ia32-bin - GRand Unified Bootloader, version 2 (EFI-IA32 binaries)
lsb-core - Linux Standard Base 4.0 core support package
lsb-cxx - Linux Standard Base 4.0 C++ support package
lsb-desktop - Linux Standard Base 4.0 Desktop support package
lsb-graphics - Linux Standard Base 4.0 graphics support package
lsb-printing - Linux Standard Base 4.0 Printing package
elilo - Bootloader for systems using EFI-based firmware
libasm0 - Disassembling engine provided to the ERESI framework
libasm0-dev - Disassembling engine provided to the ERESI framework
lsb-languages - Linux Standard Base 4.0 Runtime Languages package
lsb-multimedia - Linux Standard Base 4.0 Multimedia package
lsb-qt4 - Linux Standard Base 4.0 Qt4 support package
refit - graphical boot menu for ia32 and x64 EFI systems
ia32-libs-multiarch - Multi-arch versions of former ia32-libraries
microcode.ctl - Intel IA32/IA64 CPU Microcode Utility

помогите.