Problem with matlab path and symbolic toolbox

Hi, what is the solution of this problem:
Warning: "/Applications/MATLAB_R2012b.app/toolbox/maple" not found in path. 
> In rmpath at 58
In matlabrc at 206 

 When I checked the application-toolbox, maple-toolbox is there. But everytime I start matlab, I get above warning. Also, how can I switch from matlab symbolic toolbox to maple symbolic toolbox in matlab.