[Plugin: SP Courseware] IE cannot open the Internet Site Error

Hi,

Trying to activate SPcourseware on my website and I get an error when I try to add a scheduled entry. I get the following error:
Internet explorer cannot open the internet site: http://yourbizu.com/wp-admin/admin.php?page=schedule

It will however let me create an assignment.
I had a page called schedule but had a numbered page id so I renamed the page id to schedule, still same error, then I deleted it same error.

I would be very grateful for some assistance. Any ideas?

Thanks in advance,

Cynthia

http://wordpress.org/extend/plugins/scholarpress-courseware/