issues with scale mode in oracel virutal machine in mint 15

Hi;
I have mint 15 64bit on a AMD Athelon 250 dual core 3GHZ with 3GB ram and 650GM HDD machine and installed oracle VM and have installed win 7 all is well, but when I try "Scale Mod" to fit the VM to cover my whole screen, the movements incl. the mouse courser, etc.. becomes freezing or freeze-framing and disappearing of the courser, etc.. In other mod all is well and works normally and this is just happening in "scale mode"

Does anyone know how to address this issue? is it because of mint limitations? How can I fix this issue?

My monitor being 20 inch and having a small win 7 vm screen is a headache. I need the win 7 vm to cover the whole screen and scale mode is the only way but with above issues. Thanks in advance for your help.

 

http://www.youtube.com/watch?v=mBAbcwsKog8


just install guest install Additions and key is i guess HOST +F to see full screen


http://www.virtualbox.org/manual/ch01.html

http://www.dedoimedo.com/computers/virtualbox-4.html

http://askubuntu.com/questions/18425/how-to-use-ubuntu-in-full-screen-mode-on-virtualbox

see these please

sorry i dont have virtual box right now or i give you exact screenshots