i cant figure out how to use aviread()

hay im trying to learn image processing for my final year project on real time motion detection and object tracking with gsm module but i cant even use aviread() properly it gives me the following error:

??? Error using ==> aviread at 73 Unable to locate decompressor Indeo5 to decompress video stream. See Mathworks Technical Solution 1-4G50QZ for more info.

Error in ==> bb at 1 f=aviread('samplevideo.avi');

and i dont know what it means. could this error be occurring because my M file and sample video are in different folders?

[Geoff Hayes]

No, this error is not occurring because the m file and the sample video are in different folders. Check the link http://www.mathworks.com/support/solutions/en/data/1-4G50RI/index.html which may provide you with a way to get past this problem.

[Ayesha ayub]

thank you