bcrypt error: Devise ruby 2.0 and rails 3.2.13 -

where try run bundle install , got below error:

c:\users\xxx\documents\netbeansprojects\githupbdcm\trunk>bundle exec rake rake aborted! incompatible library version - c:/ruby200/lib/ruby/gems/2.0.0/gems/bcrypt-ruby-3 .1.1.rc1-x86-mingw32/lib/bcrypt_ext.so c:/users/xxx/documents/netbeansprojects/githupbdcm/trunk/config/application .rb:13:in `<top (required)>' c:/users/xxx/documents/netbeansprojects/githupbdcm/trunk/rakefile:5:in `req uire' c:/users/xxx/documents/netbeansprojects/githupbdcm/trunk/rakefile:5:in `<to p (required)>' (see full trace running task --trace) 

my gem file looks like:

gem 'bcrypt-ruby', '3.1.1.rc1', :require => 'bcrypt' 

i have 3 versions of gem:

c:\users\xxx\documents\netbeansprojects\githupbdcm\trunk>gem uninstall bcrypt-ruby  select gem uninstall: 1. bcrypt-ruby-3.1.1-x86-mingw32 2. bcrypt-ruby-3.1.1 3. bcrypt-ruby-3.1.1.rc1-x86-mingw32 4. versions 

still got error, kindly help

with regards, chandra

check rakefile. line 5. also, can run task using --trace flag , post results?