Linux ubuntu 11.04 does not install on my virtual machine?

Hello guys Relating to a issue installing ubuntu in my exclusive machine.recently WHEN I downloaded ubuntu and burned it to your cd as well as a dvd.but now Relating to a issue, when after the setup can be nearly 80% percentage complete.the installation stops as well as says of which cd or dvd carries a problem.but Relating to tested the cd and dvd and even the disc drive, in addition the.Iso document using 7zip plus cd checker.I allocated 304 mb regarding ram outside 896 mb.would anyone witnesses that it should be the trouble.I am using oracle vbox SEVERAL.0.6 and get xp since host.

Why definitely not try while using ISO photograph directly, instead belonging to the host drive and also a physical disk

For a new desktop install you will want 512 mb memory.
And if try and do nearly anything extra (eye candy) considering the graphics you will possess problems by using 512 memory.
An effective way to check the downloaded iso along with the cd is to check that md5sum.See the next link
All the best ..