Since the error occurs, your program is not running very fine. Can you share your VI here? Also, were you able to use the server properly before? There is an IP address mentioned in the error, did you try to use the correct IP address?
You cannot open multiple references to the same server at the same time. Its like calling a mobile when its already on call with someone else. You can use the reference and do multiple tasks but i suggest you keep the programming sequential here.
Yes, you cannot call the same database twice at the same time. It is busy communicating with one thread so it should not be called again. Thats what you are doing wrong in your program (by the first look of it). You are calling it twice at the same time.