[ccnet-user] Subversion Hooks is not recongized as an internal or external command?

[Edwin]

I use subversion as my version control,these day I add pre-commit hook
to prevent clinet commit something.It works fine for user manual
commit but ccnet. I create a exec task call svn command,it commit fail
with my pre-commit hook and report my program is not recongized as an
internal or external command!.I use VisualSVNServer and using
VisualSVNServerHooks.exe in my pre-commit hook.