Devil may cry trouble?

[SleeplessHunter]

Hey guys/gals, hows it going!

Quick Q!

I just backed-up Devil May Cry (first, not second), but when I load the backup (using swap disc method and flip-top, works fine for other games, so no "FLIPTOP SUCKS!" responses please ) it freezes just as its loading the intro movie after it says:
"Warning: this game contains intense violence and gore"

and then the ps2 doesnt respond when I press buttons, nada.

However, if I load the backup, and press start/select just as the opening movie is loading, it works perfectly, and I can get into the main menu screen and play the game as normal (and cutscenes work too)

Any ideas why the main intro wont play?
Its got me confused...

(Btw- Burned w/ nero, verbatim data-life plus DVD-R, and at 2x speed (speed works for other games perfectly) )

Thanks!

----SH----