Redmine

Hello,
I have Redmine set up with Bitnami installer on a Windows XP machine, Mercurial is installed system-wide, but "hg" shows with a red exclamation sign in Redmine settings. Instructions on Redmine Wiki are mostly for linux installs.
I took configuration.yml.example, renamed to redmine\config\configuration.yml and commented out everything except this line:

scm_mercurial_command: hg.exe

hg.exe works from windows cmd.

There's an existing Mercurial repository on the same PC and I need to display it in Redmine projects.
Any help/search directions would be very much appreciated.