Uploading to MATLAB

Hi,

This is probably a very basic question, but I would like to try working with the livelink to MATLAB and was following the instructions for how to load my model into MATLAB but MATLAB does not seem to recognize the file. I used the format:

model = mphload('file name')

which I believe is the correct form, but I keep getting the following error:

Error using mphload (line 88)
The file "simple richards plus thermal.mph" could not be found

Is is possible my .mph files are saved in a location that MATLAB can't or won't access? Is there a particular way I should be saving all my models?

Thanks,
Shoshana