When you say you transferred the software no problem, what exactly do you mean? Did you simply copy it from the old machine to new, or did you install it?
Also, what are you using for file sharing? Just shared directories, FTP, or something else?
Lastly, what version of windows 7 do the other two have?
Sorry for all the questions, but I try to be precise when answering things, which means gathering info, usually.