Front Page Displays problem with Multi Site WP and Supporter


I'm creating a secondary blog within my Wordpress network and when I am in Settings > Reading and choose a static page for my Front Page it is dissallowed. By that I mean it returns to select after choosing save.

This does not occur for the static page for the posts page.

When I look in my master wordpress install, in Super Admin > Sites I can drill down into the site info for this particular site.

Under site options (wp_4_options) I have spotted two fields which may help solve this. (but i haven't worked out how)

The two fields are: 1) Show on front and 2) Page on front.

Are these relevant and if so how do I use it to fix a static front page for the secondary blog.