Sidebar not showing up in store pages

Hello!
I am developing a wp multisite and have marketpress installed to the parent site and one site in a subdomain. The sidebar shows up as expected in the parent site store pages, but on in the store pages of the child site.
Help! Need the sidebar in the store pages in the subdomain as well.
Thanks!
theme: blogs mu
setup: wp multisite
url: http://www.simplymusicteachers.com (parent site)
shop.simplymusicteachers.com (child site)

Thanks!

SM