Hello all i got my mini mac

when i press the menu button on the remote i get the four icons but when i press left or right it keeps going that direction ie if you push left it keeps going left even when you let go of the remote?!!
also the remote keeps turning off and the machine goes into standby have to move the mouse to get it back
is my remote faulty?
should i reinstall the os?
or is there a round this?