I'm trying to configure my virtual machine so I can share a folder between my host and guest OS, but when I try to install the Guest Additions I get the following message:
I've already done everything that is describe on: VirtualBox Guest Additions won't install on Ubuntu Server 12.04
but it's still not working.
[SOLUTION] As said in the comments, all I had to do was install the newest version. After that, it worked perfectly.