Issue while writing Watir-WebDriver scripts

[Abhishek]

Hi,

I have create a Watir project initially. Then I wanted to run the tests on FireFox and hence closed the earlier Watir project and created a Watir-WebDriver project.

In new Watir-WebDriver project, when I execute the script, I always get below error. Can you please let me know if I am missing anything.

Error
superclass mismatch for class UnknownObjectExceptionC:/Program Files/TestWise/vendor/bundle/ruby/1.8/gems/watir-webdriver-0.6.2/lib/watir-webdriver/exception.rb:8
C:/Program Files/TestWise/vendor/bundle/ruby/1.8/gems/watir-webdriver-0.6.2/lib/watir-webdriver.rb:6:in `require'
C:/Program Files/TestWise/vendor/bundle/ruby/1.8/gems/watir-webdriver-0.6.2/lib/watir-webdriver.rb:6
C:/WebDriverDemo/test_helper.rb:2:in `require'
C:/WebDriverDemo/test_helper.rb:2
C:/WebDriverDemo/firefix_google_spec.rb:1:in `load'
C:/WebDriverDemo/firefix_google_spec.rb:1
C:/Program Files/TestWise/vendor/bundle/ruby/1.8/gems/rspec-core-2.10.1/lib/rspec/core/configuration.rb:746:in `load'
C:/Program Files/TestWise/vendor/bundle/ruby/1.8/gems/rspec-core-2.10.1/lib/rspec/core/configuration.rb:746:in `load_spec_files'
C:/Program Files/TestWise/vendor/bundle/ruby/1.8/gems/rspec-core-2.10.1/lib/rspec/core/configuration.rb:746:in `map'
C:/Program Files/TestWise/vendor/bundle/ruby/1.8/gems/rspec-core-2.10.1/lib/rspec/core/configuration.rb:746:in `load_spec_files'
C:/Program Files/TestWise/vendor/bundle/ruby/1.8/gems/rspec-core-2.10.1/lib/rspec/core/command_line.rb:22:in `run'
C:/Program Files/TestWise/vendor/bundle/ruby/1.8/gems/rspec-core-2.10.1/lib/rspec/core/runner.rb:69:in `run'
C:/Program Files/TestWise/lib/testwise/rspec/rspec_executor.rb:182:in `run_spec_via_druby'
C:/Program Files/TestWise/lib/testwise/rspec/rspec_executor.rb:78:in `invoke_rspec'
C:/Program Files/TestWise/lib/testwise/rspec/rspec_executor.rb:65:in `initialize'
C:/Program Files/TestWise/lib/testwise/rspec/rspec_executor.rb:65:in `new'
C:/Program Files/TestWise/lib/testwise/rspec/rspec_executor.rb:65:in `invoke_rspec'
C:/Program Files/TestWise/lib/testwise/controllers/testwise_main_controller.rb:323:in `run_spec'
C:/Program Files/TestWise/lib/common/base_main_controller.rb:404:in `on_run_current_spec_file'
C:/Program Files/TestWise/lib/common/base_main_controller.rb:386:in `on_run_spec'
C:/Program Files/TestWise/lib/testwise/views/testwise_main_frame.rb:558:in `on_tool_click'
C:/Program Files/TestWise/lib/common/base_main_frame.rb:485:in `setup_toolbar_events'
C:/Program Files/TestWise/lib/testwise/app.rb:481:in `call'
C:/Program Files/TestWise/lib/testwise/app.rb:481:in `process_event'
C:/Program Files/TestWise/lib/testwise/app.rb:481:in `on_run'
C:/Program Files/TestWise/lib/testwise/app.rb:481:in `main_loop'
C:/Program Files/TestWise/lib/testwise/app.rb:481

Thanks,
Abhishek