Help with macro

[lupinus]

I run the cheese mac on my computer(Windows XP) at home with no problems but when I try to run it on my brothers computer(Windows ME) I have problems. The macro starts but does not reconize the milk at all. It will reconize all other components and put them in any slot I want but no milk. When it tries to buy, it will buy ren but no milk. This is the exact macro I run in both places. Could it be a window problem or something else. Oh by the way he just had a cable modem hooked up yesterday and that is when I tried to run the macro.