When attempting to access a server via the Connect to Server command in the Finder’s Go menu, you may get an error message that states: “The text entered does not appear to be a recognized URL format.” The message may appear even if the server address you entered is entirely correct.
According to Apple, this erroneous message can crop up if you are either (a) running Mac OS X 10.5 via an account that was updated from 10.4 or (b) using data from a Time Machine backup that was initially created via data migrated from another Mac.
In either case, the solution is to delete a folder named
URLMount (from old Mac), located in the /System/Library/Filesystems folder. Then restart your Mac.