Why are the changes done to fs-root, not reflecting?

Hi all,

I am trying to modify the file fs-root (on belenix).
Here is the problem..

I just wanted to check whether any modifications done to the file will be reflected when its booted up, so just echoed a statement and saved it back to the cd and then booted it..

Unfortunately it did not reflect the changes i had made,however when i opened up tat file,the modifications i did were very much present..

How is this possible?
Also how do i make my changes visible?
please help me out!!!:confused: