RAKE ERROR

when i try to run rake i get an eroor that goes like this:
(in /home/dwain/project/stuad)
/home/dwain/project/stuad/config/boot.rb:29:Warning: require_gem is obsolete. Use gem instead.
rake aborted!
Test failures
(See full trace by running task with --trace)
then i run a trace and i get this:
dwain@personal:~/project/stuad$ rake --trace
(in /home/dwain/project/stuad)
/home/dwain/project/stuad/config/boot.rb:29:Warning: require_gem is obsolete. Use gem instead.
** Invoke default (first_time)
** Invoke test (first_time)
** Execute test
** Invoke test:units (first_time)
** Invoke db:test:prepare (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:test:prepare
** Invoke db:test:clone (first_time)
** Invoke db:schema:dump (first_time)
** Invoke environment
** Execute db:schema:dump
** Invoke db:test:purge (first_time)
** Invoke environment
** Execute db:test:purge
** Execute db:test:clone
** Invoke db:schema:load (first_time)
** Invoke environment
** Execute db:schema:load
** Execute test:units
** Invoke test:functionals (first_time)
** Invoke db:test:prepare
** Execute test:functionals
** Invoke test:integration (first_time)
** Invoke db:test:prepare
** Execute test:integration
rake aborted!
Test failures
/usr/local/lib/ruby/gems/1.8/gems/rails-1.2.1/lib/tasks/testing.rake:50
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in call' /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in execute’
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in execute’
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:357:in invoke' /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in synchronize’
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in invoke' /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:364:in invoke_prerequisites’
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:999:in each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:999:in send’
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:999:in each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:363:in invoke_prerequisites’
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:356:in invoke' /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in synchronize’
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in invoke' /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in run’
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in run’
/usr/local/lib/ruby/gems/1.8/gems/rake-0.7.1/bin/rake:7
/usr/local/bin/rake:16:in `load’
/usr/local/bin/rake:16
can some one help me with a step by step guide because i am new to ruby, so please be careful.