DreamCast/nullDC Not Responding o.o

[yozoolorna08]

i have this problem nullDC keeps not responding now but the games works before but now it has this not responding problem =/

[Tucco]

No sega system will respond while you have squaresoft imagary on the screen. You heretic.

:serious:
There is nowhere near enough details in you post. Have you changed anything? Did you check to see if the ROM files or the emulator files go corrupted? Did your little brother kick your machine?