Redmine

Hi Team

when i am running the command "rake generate_secret_token" in the redmine directory its showing an error like this

rake aborted!
/usr/local/lib/ruby/1.8/x86_64-linux/digest/sha1.so: undefined symbol: rb_Digest_SHA1_Init - /usr/local/lib/ruby/1.8/x86_64-linux/digest/sha1.so

(See full trace by running task with --trace)

Here is my gem list

• LOCAL GEMS ***

actionmailer (3.2.8)
actionpack (3.2.8)
activemodel (3.2.8)
activerecord (3.2.8)
activeresource (3.2.8)
activesupport (3.2.8)
arel (3.0.2)
builder (3.0.4)
bundler (1.2.1)
erubis (2.7.0)
hike (1.2.1)
i18n (0.6.1)
journey (1.0.4)
json (1.7.5)
mail (2.4.4)
mime-types (1.19)
multi_json (1.3.7)
mysql (2.8.1)
polyglot (0.3.3)
rack (1.4.1)
rack-cache (1.2)
rack-ssl (1.3.2)
rack-test (0.6.2)
rails (3.2.8)
railties (3.2.8)
rake (0.9.2.2)
rdoc (3.12)
sprockets (2.1.3)
thor (0.16.0)
tilt (1.3.3)
treetop (1.4.12)
tzinfo (0.3.35)

my ruby version is

ruby 1.8.7 (2008-05-31 patchlevel 0) [x86_64-linux]

Please help me

Thanks
Zam