When a remote database is involved, to move the remote database, you have to either create a new remote database (which ultimately creates a "path of breadcrumbs" back to the "master") or you have to "draw it a map" back to the "master". Here is the Sage knowledgebase article on how to do this, before you start the move: http://kb.sagesoftwareonline.com/app/answers/detail/a_id/19817/kw/move%20remote%20database
But I normally get the call after the remote database was moved, and time has passed. If you are lucky, you may be able to simply change the name of the computer: http://kb.sagesoftwareonline.com/app/answers/detail/a_id/19817/kw/move%20remote%20database
It may get significantly more technical: You may have to check the port and the IP address... You may have to ping things... http://kb.sagesoftwareonline.com/app/answers/detail/a_id/14590/kw/RDB%20change%20IP%20address%20for%20host
I know some people who would be perfectly comfortable taking that info and diving in. I know others who should not! Prior to diving in to all that, you may wish to call me.