Im getting this error when running console

[yossiedri]

Salesforce::Contact.first
NoMethodError: undefined method casecmp' for false:FalseClass from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/asf-soap-adapter-1.3.1/lib/active_record/connection_adapters/activesalesforce_adapter.rb:419:inadd_rows'
from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/asf-soap-adapter-1.3.1/lib/active_record/connection_adapters/activesalesforce_adapter.rb:410:in each' from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/asf-soap-adapter-1.3.1/lib/active_record/connection_adapters/activesalesforce_adapter.rb:410:inadd_rows'
from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/asf-soap-adapter-1.3.1/lib/active_record/connection_adapters/activesalesforce_adapter.rb:407:in each' from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/asf-soap-adapter-1.3.1/lib/active_record/connection_adapters/activesalesforce_adapter.rb:407:inadd_rows'
from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/asf-soap-adapter-1.3.1/lib/active_record/connection_adapters/activesalesforce_adapter.rb:388:in select_all' from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/activerecord-2.3.14/lib/active_record/base.rb:665:infind_by_sql'
from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/activerecord-2.3.14/lib/active_record/base.rb:1582:in find_every' from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/activerecord-2.3.14/lib/active_record/base.rb:1539:infind_initial'
from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/activerecord-2.3.14/lib/active_record/base.rb:617:in find' from /usr/local/rvm/gems/ruby-1.8.7-p370/gems/activerecord-2.3.14/lib/active_record/base.rb:627:infirst'
from (irb):1