nspire with clickpad dvt 2.0 cannot install os 3.1

Hello everyone, I am a Chinese high school student, I would like to ask you a question. I bought a nspire with clickpad last week.
and it was an os 1.7 dvt system.I try to install os 3.1.0.392,but when it was sending new system the link software warning that the os is Damaged or not support.Then I try to install os 2.1.1.38,it installed sucessfully ,but when reboot,it stopped at loading operating system.At last I install os 1.7.1.50 ,it finally worked well.How can I install os 3.1.0.392 on my dvt 2.0?
Thanks lot!
and it was an os 1.7 dvt system.I try to install os 3.1.0.392,but when it was sending new system the link software warning that the os is Damaged or not support.Then I try to install os 2.1.1.38,it installed sucessfully ,but when reboot,it stopped at loading operating system.At last I install os 1.7.1.50 ,it finally worked well.How can I install os 3.1.0.392 on my dvt 2.0?
Thanks lot!