Problem with db:migrate in rails 3.1 with mysql

Hi,

I have been working with Rubymine 3.1.1 with rails 3.0.6 since last 6
months.
I have just started working with rails '3.1.0.rc5' with RubyMine 3.2.3
and mysql.
Just to get hands-on with the new version of rails, I tried creating a
sample application with single scaffold (User username:string
password:string), but it gives the following error on db:migrate :-

== CreateUsers: migrating