Yes, I meant, the Host -> SQL page from where you can run the queries.
When I add a connection string in web.config, I do find it in the dropdown box to select. that works well with exernal databased too, as long as the external database id MS SQL, but if the external database is non-MS-SQL then it does not work. My guess is that it does not recognise the provider attribute of connection string and uses sqlclient only.
If I use the same external database via code (that is create a connection object manually) then it works.
I think this may be considered as a bug, and shall be taken care in next version