When I click on one of the servers under the SQL Server Group in EM, the icon switches to one with a jagged red line to the right of the server box. I can't find any information on what this indicates. There seems to be no impact on my ability to access the servers, but the fact that the line is red seems to indicate that something is wrong. (This is SQL Server 7.) I checked BOL but didn't find any topics about this aspect of EM. Any ideas?

TIA.