Can I have different login URL for different ASP .NET MVC3 areas?

e.g. I would like to have different login page for Administrator and Data entry operators.

I see a web.config in each area's view portion and I have tried doing:

```
<authentication mode="Forms">
    <forms loginUrl="~/Administration/Account/LogOn" timeout="2880" />
</authentication>

```

but it does not play well.

Cheers.