ati - Unity 3D doesn't work on ubuntu 12.04 LTS in virtual box hosted by Windows 7 64bit

Can't google out the solution through some time so I'm asking here.

I have installed Linux Ubuntu 12.04 LTS in virtual box hosted by Windows 7 64bit

Simple >>>my 3D stopped working after some kernel headers update<<< few months ago. Just like that. I don't member which version was it.

In meantime there was 2 or 3 new releases of VirtualBox which I have installed.
Every time I am updating VirtualBox Guest Additions to the newest version.

My 3D in Ubuntu still doesn't work.

root@pjadmin-VirtualBox:~# /usr/lib/nux/unity_support_test -p
OpenGL vendor string:   VMware, Inc.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x300)
OpenGL version string:  2.1 Mesa 8.0.2
Not software rendered:    no
Not blacklisted:          yes
GLX fbconfig:             yes
GLX texture from pixmap:  yes
GL npot or rect textures: yes
GL vertex program:        yes
GL fragment program:      yes
GL vertex buffer object:  yes
GL framebuffer object:    yes
GL version is 1.4+:       yes
Unity 3D supported:       no

My graphics card in PC is ATI 6850. Please help.