I assume that the problem is with the alias for the database name, not an object in database. If that is the case, then it all depends on how the connection is configured on each computer via the tnsnames.ora file. It could be that the database in question has different aliases on user's desktop and on the server machine.
The options are:
- find out what the alias is on the server and use it
- change Oracle client configuration (tnsnames.ora) to match the alias on user's desktop (or vice versa)