I bet it might be the folder within a folder problem. I had this happen once I was completely baffled for several hours until I figured it out.
In other words you want the target folder let's say mod x to lead directly to the mod data files (meaning upon selecting the folder it opens to the data files) not mod x, mod x, data. Sometimes upon unzipping you'll get an extra folder on top of the folder that contains the data. JGSME dose not like that.
|