Program on floppy disk doesn't work after copying from floppy to harddrive

I have a program that I need for my math class on a floppy (it is a dos-based program) and every time I copy it onto the harddrive, I open up the .exe, and when it says press enter to continue, it exits (obviously, when I run it from the floppy, it works). Is there any way to get it working without the floppy?

Thanks.

Jam it back in, in the dark.

It didn't work.

There's nowhere I can't reach.

I got it working. There was a hidden file in the folder that I didn't know about.

I just have one more problem- whenever I enter the graphing mode, the program goes to fullscreen dos mode and I cannot put it in windowed mode no matter what I try. Is there any way to transform the full screen mode into windowed mode? Do you know what is possibly going on here? I need to put it in windowed mode because that is the only way I can get a screenshot of what I did in the program (I have tried numerous programs, and they can't take fullscreen dos screenshots, even though I did exactly what they said). (also, this happens when I run it from the floppy)

How ya doing, buddy?

Oh, I forgot to mention that. Alt + Enter acts like Alt + Tab for some reason (i.e. it minimizes the window).

I am a dolphin, do you want me on your body?