Interfacing MikroTik RB433H with Cisco WLC as a wired guest

Hi,

I would like to use MikroTik RB433H router as a wired guest to a Cisco 4400 Series WLAN controller to get a secured Internet connectivity. When a user is connected as a wired guest to the WLC, the user receives an IP address from the egress VLAN but it is not able to pass any traffic until it completes the web authentication process. So the user is redirected to the default page of the WLC to authenticate with username and password. I appreciate any suggestion to interface the MikroTik router to the WLC to bypass the interactive process and simply pass a default username and password to the web authentication in the WLC using RouterOS scripting.

http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a00808ed026.shtml

Thanks.