restful authentication - sending email activation

for some reason, when i run restful_authentication on my development server, the server will generate the activation email, but when i run the same codebase on the production server, the activation email makes no attempt to send..

[development.log] Processing UsersController#create (for 127.0.0.1 at 2009-06-04 13:56:04) [POST]   Parameters: {"user"=>{"password_confirmation"=>"xxx", "password"=>"xxx", "login"=>"xxx", "email"=>"xxx"}, "commit"=>"Sign up", "authenticity_token"=>"xxx"} Cookie set: auth_token=; path=/; expires=Thu, 01 Jan 1970 00:00:00 GMT   User Exists (0.2ms) SELECT "users".id FROM "users" WHERE ("users"."login" = 'xxx') LIMIT 1   User Exists (0.1ms) SELECT "users".id FROM "users" WHERE ("users"."email" = 'xxx') LIMIT 1   User Create (0.6ms) INSERT INTO "users" ("name", "salt", "updated_at", "activated_at", "crypted_password", "remember_token_expires_at", "activation_code", "remember_token", "login", "email", "created_at") VALUES('', '345e1c4d95b6b771fc015d7ae710ce4f5cf40ecd', '2009-06-04 17:56:04', NULL, '951c7f1c7adeba7689cf2c3d69faab3d15031fdc', NULL, '938e16e49a6e34f1b00a416dcc7f357fce6a28bf', NULL, 'xxx', 'xxx', '2009-06-04 17:56:04') Sent mail to xxx