Quirky behaviour when using CVS?

Hi there - has anyone ever tried this?
$ rails test
create app/apis
$ cd test
$ script/server
=> Rails application started on
=> Ctrl-C to shutdown server; call with --help for opt

good so far…now:

$cvs import -m “initial import” test test v1
$cd /tmp
$cvs co test
$cd test
./script/…/config/environment.rb:50:in `require’: no such file to load
– active_support (LoadError)
from ./script/…/config/environment.rb:50
from script/server:44

How does one fix this ? I need to be able to check in my source files.