Problem with SF3:Double Impact

[redefine]

I have a problem with my backup copy of my SF3ouble Strike.
It doesn't run after I try to make it selfboot.
Well, it shows the 'SEGA' screen and it even shows the First Capcom logo. (White screen, huge 'Capcom' in the middle)
But after that it bounces back to the Main Menu again. (The one with the Memory card and settings)

The size of the CD is also a bit small.
It's about 278 MB.
SF3: Double Impact has to game in it.
The size should be bigger than that.

There's another Capcom game that has 2 games in it.
Jojo bizzare adventure, which uses the same board as SF3.
The size of it is 600 something MB.
Shouldn't SF3I be about that size.
(As I say before both are made by Capcom on the same board and has 2 games in it <Their 2 games only differ a bit>)
By looking at both games I even think that SF3I should be bigger in capacity

When I make an exact copy of the non-selfboot one with CloneCD, it's showing the same size (278 MB) and it runs with the Utopia boot CD.
The game cannot be a selfboot CD since it only has 1 track. (CloneCD says it is)

So, can anybody tell me what to do.
Any kind of clue will be very helpful.