Hi All, Mack is a framework using ruby. I followed this link to work with this framework. http://www.mackframework.com/2008/04/18/046-the-obligatory-blog-demo-take-2/ I installed Following gems PATH> gem install mack Need to update 15 gems from http://gems.rubyforge.org ............... complete Install required dependency mack_ruby_core_extensions? [Yn] y Install required dependency application_configuration? [Yn] y Install required dependency cachetastic? [Yn] y Install required dependency thin? [Yn] y Select which gem to install for your platform (i386-mswin32) 1. thin 0.8.0 (i386-mswin32) 2. thin 0.8.0 (ruby) 3. Skip this gem 4. Cancel installation > 1 Install required dependency eventmachine? [Yn] y Select which gem to install for your platform (i386-mswin32) 1. eventmachine 0.8.1 (i386-mswin32) 2. eventmachine 0.8.1 (ruby) 3. Skip this gem 4. Cancel installation > 1 Install required dependency crypt? [Yn] y Successfully installed mack-0.4.6 Successfully installed mack_ruby_core_extensions-0.1.5 Successfully installed application_configuration-1.2.2 Successfully installed cachetastic-1.4.2 Successfully installed thin-0.8.0-i386-mswin32 Successfully installed eventmachine-0.8.1-i386-mswin32 Successfully installed crypt-1.1.4 AND also installed these two... gem install memcache-client gem install datamapper Finally i un the server > rake server it says need to install do_sqlite3 I tried to install do_sqlite3 --> gem install do_sqlite3 But i got this error C:\New Folder\trails\blog2>gem install do_sqlite3 Building native extensions. This could take a while... ERROR: While executing gem ... (Gem::Installer::ExtensionBuildError) ERROR: Failed to build gem native extension. ruby extconf.rb install do_sqlite3 extconf.rb:1:in ``': No such file or directory - uname -sr (Errno::ENOENT) from extconf.rb:1 Gem files will remain installed in c:/ruby/lib/ruby/gems/1.8/gems/do_sqlite3-0.2 .5 for inspection. Results logged to c:/ruby/lib/ruby/gems/1.8/gems/do_sqlite3-0.2.5/ext/gem_make.o ut. Please Help to me continue to run the Application Regards, P.Raveendran RailsFactory jazzezravi / gmail.com http://raveendran.wordpress.com -- Posted via http://www.ruby-forum.com/.