nock thingy moving around on string....

[No eye deer]

Howdy,
Anyone give me an idea on WHY my nock point thingy moved, and how to fix it?
All the serving moved up with it,then I found I could pull/push it back down with my fingers.
If it's not one thing it's another.....

Mark

[No eye deer]

Oh bloody hell,
That'd be right.
OK What if I were to get another string,and maybe keep this one as a back up. Maybe a good aftermarket one perhaps.my string is looking a little tatty.I think it would be cheaper than buying all the equipment needed to re-serve? The club I go to on Sundays prolly has the gear needed,either to make a string or at least to serve it.

Many thanks for the help.It's appreciated.

Mark