[SOLUCIONADO] Error Metasploit

cordial Saludo

Estoy comenzando a trabajar con Metasploit  utilizando Backtrack 5 r3 pero ahora me esta apareciendo el siguiente error cuando lo ejecuto si me pudieran orientar como solucionarlo

root@bt:~# msfconsole
/opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- active_record (LoadError)
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/msf3/lib/fastlib.rb:369:in `require'
   from /opt/metasploit/msf3/lib/msf/core/db_manager.rb:2:in `<top (required)>'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/msf3/lib/fastlib.rb:369:in `require'
   from /opt/metasploit/msf3/lib/msf/core/framework.rb:69:in `<class:Framework>'
   from /opt/metasploit/msf3/lib/msf/core/framework.rb:13:in `<module:Msf>'
   from /opt/metasploit/msf3/lib/msf/core/framework.rb:5:in `<top (required)>'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/msf3/lib/fastlib.rb:369:in `require'
   from /opt/metasploit/msf3/lib/msf/core.rb:34:in `<top (required)>'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/msf3/lib/fastlib.rb:369:in `require'
   from /opt/metasploit/msf3/lib/msf/ui/console/driver.rb:2:in `<top (required)>'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/msf3/lib/fastlib.rb:369:in `require'
   from /opt/metasploit/msf3/lib/msf/ui/console.rb:11:in `<top (required)>'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/msf3/lib/fastlib.rb:369:in `require'
   from /opt/metasploit/msf3/lib/msf/ui.rb:11:in `<top (required)>'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/ruby/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
   from /opt/metasploit/msf3/lib/fastlib.rb:369:in `require'
   from /opt/metasploit/msf3/msfconsole:131:in `<main>'
root@bt:~#

 

apt-get upgrade