Problems in downloading shapefile

Hi everyone!

I'm trying to load a shapefile, but I have this problem:

Error using openShapeFiles>checkSHP (line 64)
Unable to open both filename.shp and filename.SHP.
Error in openShapeFiles (line 18)
[basename, ext] = checkSHP(basename,shapeExtensionProvided);
Error in shaperead (line 210)
= openShapeFiles(filename,'shaperead');
Error in xxxx (line 31)
S=shaperead('filename');

I've already downloaded 'Mapping Toolbox' and the polygons are without z. Can you help me?

[Rohit Pappu]

Can you please attach the shapefile?