I have created 2 groups on Managed Metadata Service. I've created some TermSets.
In a .NET application I can connect to sharepoint admin site using SPSite, but when I ask for TermStores the store.count is allways == 0, but I am sure they really exist.
using (SPSite site = new SPSite(url))
TaxonomySession session = new TaxonomySession(site);
TermStore store = session.TermStores["Managed Metadata Service"];