Ok, then the OS is not the issue. I remember the emulator was not really a real emulator, though, and therefore it did not emulate the real machine correctly. In fact the student software cannot even run Ndless nor Ndless games when we use the versions with OS 2.x. From what I remember, games like PacMan and Nyan Cat were not even full screen or some stuff did not show up.
The best solution would be to use Goplat's emulator, but then the problem is that you won't be able to see the color, as it emulates the regular TI-Nspire, not the color one. http://www.omnimaga.org/index.php?topic=6763.msg156233#msg156233
Texas Instruments just fails epically at keeping their emulation accurate. We had the same problem with their 83+ emulators. The worst part is that the 84+ emulator that came built in older Nspire models did not emulate the 84+ correctly either. X.x