Unable to use Refprop file on Matlab

I am trying to run a simple command to find water temperature using a refprop m file but i get the following error

Error using refpropm (line 267)
[SETUP error 101] error in opening file for component #  1; filename = (C:\Program Files\REFPROP\fluids\water.fld
). 
Error in Tfunc_PQ (line 2)
         T= refpropm('T','P',P,'Q',Q,'water');

Can anybody please tell the solution