flload, postinterp, posteval not working in matlab

Hi, I need to export data from a comsol model to matlab. So, I need the functions flload, postinterp, posteval. I tried to learn about flload in matlab R2009a, so I wrote "help flload" in command window of matlab but it shows the following message:
"flload not found."
Same thing happens when i tried for postinterp and posteval. What should I do?

I also write a program in matlab using the functions flload, postinterp. Here I find the following error:
"??? Undefined function or method 'flload' for input arguments of type 'char'."
Can anyone give any solution why matlab can not identify flload?

Rasel