It sounds like you need to add the directory with those files in it to your path.
You can do this using the "Set Path" dialog (on the toolbar), or programmatically using path functions like "path" or "addPath"
http://www.mathworks.com/help/matlab/ref/path.html http://www.mathworks.com/help/matlab/ref/addpath.html
Since you mention this is on a server, keep in mind that the path names may be different than on your (I presume) local machine.