SR125 Centre stand problem.

Hi,

I've got a Yamaha SR125, the center stand spring keeps falling off 
.....

I am hooking the small end of the spring to the centre stand lug and
the wide end to a small lug on the frame about an inch long. But it
keeps jumpting off, am i attaching it to the correct place ??? Looks
as if the lug on the frame should have a rubber bung or something on
it... any ideas ??

Thanks