Scheduling an URL to run every minute or so?

Hi,

I need a simple utility that will run a defined URL every minute or so.
The Windows Task Schedular can only schedule tasks per day, so I need
something else.

The utility needs to be installed on a Windows 2003 webserver to repeatedly
trigger a specific webpage of my webapplication.
That webpage will then check a custom 'application task queue' to see which
tasks are waiting to be automatically performed by the webapplication, for
example: send out the next 20 emails from a software email queue or backup
the database and send the backup to a defined email address.
The webapplication itself will add defined tasks to the 'application task
queue' when relevant.

Any idea where I can find such a scheduling utility? Or any other ideas to
accomplish the same thing?

Thanks in advance.

Regards, Marja