I didn't specify the real server name instead of generic 'server1' in the sql. Now it works!
Now I woul like to gather informations from all my ssql servers, and put them into the same table on a separate server which I use for tests. I have created linked servers, but what is the correct syntax to use to refer to their objects? e.g. select * from linkedServer1.master.systables?
Please, how can I add a new question in my previous Topic, instead of creating another one?
Thanks for your replies.