What is the most recent version of Ubuntu that I can install on a Toshiba Satellite 1135-S155?

The reason why I am asking this is because someone gave me this laptop (all stock components) and I tried installing Ubuntu 12.10 but the install DVD doesnt run. I was able to install Ubuntu 6.10 and it works fine nevertheless I want a more current version and saw online that this machine was only supported up to a certain version (which I dont know)

thanks for your help,