How to read data from *.csv file in real time?

Greetings to all.

I am using MATLAB R2011b on Windows 7 32-bit platform. In my work, one software constantly writing the data in a csv file. I have to use these data in real time. I tried xlsread, csvread, fopen commands available in Matlab but all of them are not working. I guess as the file opened by another software, Matlab have trouble to read that. Can anyone give some suggestion to bypass this problem? Is there, any way, to use the data from csv file in real time manner?

Any help is appreciated.