uStore works only with MS SQL server. Dynamic documents that you add to uStore can use file based data, or you can use oracle/mySQL - because the production is done on uProduce server that supports these other DB formats.
Your screen shot of the SQL manager does not show high up enough to see the server name. And the screenshot of the ustore page does not show the servername, so I cannot tell if you entered the correct value.
In most cases, XMPie SQL servers will be installed with a named instance and not the default instance. Therefore, the SQL server should be referred to as SERVERNAME\INSTANCE
In most cases the SQL instance will be named XMPIE, so your server name field should be the hostname (or ip address) of the sql server followed by \xmpie