Not toable to login as admin

hi any one cn tell me the solution of the
problem…!!!

-/!\ FAILSAFE /!\ Tue Nov 17 17:42:14 +0530 2009
Status: 500 Internal Server Error
no such file to load – sqlite3
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
gem_original_require' /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:inrequire’
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:156:in
require' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:521:innew_constants_in’
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:156:in
require' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/core_ext/kernel/requires.rb:7:inrequire_library_or_gem’
/usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/core_ext/kernel/reporting.rb:11:in
silence_warnings' /usr/lib64/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/core_ext/kernel/requires.rb:5:inrequire_library_or_gem’
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:10:in
sqlite3_connection' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:insend’
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in
new_connection' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:245:incheckout_new_connection’
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:188:in
checkout' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:inloop’
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in
checkout' /usr/lib/ruby/1.8/monitor.rb:242:insynchronize’
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:183:in
checkout' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:98:inconnection’
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:326:in
retrieve_connection' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:inretrieve_connection’
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in
connection' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/query_cache.rb:9:incache’
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/query_cache.rb:28:in
call' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:incall’
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/head.rb:9:in
call' /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/methodoverride.rb:24:incall’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/params_parser.rb:15:in
call' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/session/cookie_store.rb:93:incall’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/failsafe.rb:26:in
call' /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:incall’
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in
synchronize' /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:incall’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/dispatcher.rb:114:in
call' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/reloader.rb:34:inrun’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.3.4/lib/action_controller/dispatcher.rb:108:in
call' /usr/lib64/ruby/gems/1.8/gems/rails-2.3.4/lib/rails/rack/static.rb:31:incall’
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:46:in
call' /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:40:ineach’
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in
call' /usr/lib64/ruby/gems/1.8/gems/rails-2.3.4/lib/rails/rack/log_tailer.rb:17:incall’
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/content_length.rb:13:in
call' /usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/handler/webrick.rb:50:inservice’
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in service' /usr/lib/ruby/1.8/webrick/httpserver.rb:65:inrun’
/usr/lib/ruby/1.8/webrick/server.rb:173:in start_thread' /usr/lib/ruby/1.8/webrick/server.rb:162:instart’
/usr/lib/ruby/1.8/webrick/server.rb:162:in start_thread' /usr/lib/ruby/1.8/webrick/server.rb:95:instart’
/usr/lib/ruby/1.8/webrick/server.rb:92:in each' /usr/lib/ruby/1.8/webrick/server.rb:92:instart’
/usr/lib/ruby/1.8/webrick/server.rb:23:in start' /usr/lib/ruby/1.8/webrick/server.rb:82:instart’
/usr/lib64/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/handler/webrick.rb:14:in
run' /usr/lib64/ruby/gems/1.8/gems/rails-2.3.4/lib/commands/server.rb:111 /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:ingem_original_require’
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require’
script/server:3