[ubuntu] Virtualbox wont boot

Hi guys,


The problem is I installed Virtualbox in ubuntu 12.04 And i want to run win7. When I click on start this is coming up:

No bootable medium found! System halted.

I told to the program where to find the win7 iso image.
But its just not doing it.

And also I opened the win iso file and I can just see 1 txt inside what says:

This disc contains a "UDF" file system and requires an operating system
that supports the ISO-13346 "UDF" file system specification.

So I opened the synaptic package manager and installed the udf packages. But still a can`t see anything just the txt in the iso.

Is this the reason why the virtualbox not booting the windows?

Please help me, i was looking for the solution the whole day...

Thanks