[ROR][CAPISTRANO] From windows to a linux server

Hello,

I have some troubles using capistrano.

My configuration is:

a client where I use capistrano 2.0 (win32 platform)
precompiled ruby version : 1.8.5
a server where I want to deploy my application (linux/ubuntu
distribution)

I encountered this error message when I try to do : cap deploy:setup
"Bad File Descriptor"

Thanks for your help.