wii controller problems

hi
just got a brand new wii console and this is the problem.
turn on console with controller-ok
press A on controller to start-ok
now, no cursor on screen from controller until I plug in the nun chuck then the cursor appears then I can unplug the nun chuck.
this can happen occasionally if I flick back and forwards between menu's
new to the wii so I've got limited knowledge.
I did try to sync controller for the first time without reading the manual and now I know it was already synced from new. has this caused this problem?:rolleyes:
thanks
prok