Maybe you have a japanese RGSS DLL, so the japanese characters display like "?". Try to use a english DLL like the RGSS102E.dll, with this DLL the error messages will aparear in english.
If the game freezes around 10 seconds, it throws a SystemStackError. That happends when the scripts make a very time consuming action, like drawing a lot of bitmaps. This error can happen when the computer has not enought proccesor, or RAM, so if your computer is old maybe that's the problem.