Odd error when running rake (Windows/DOS)

I have just started to use Migrations which are great, no more db.sql
I noticed that when I run a rake, eg. rake migrations I get an error
about my developement log file not being availible to access and to
chmod it to 0666. Im on Windows so I cant chmod, but they are not read
only or hidden.

Now the rake still executes fine so I think it is just related to
writing to the developement log file. Looking in the log files they all
say nil inside! I’m guessing but after playing with my app they should
be full of line?

Has anyone come across this oddity?

Cheers Peter.