I know this post is a month old but the problem may be in the way the TV changes input. If it has separate input commands then that is how you should set up the remote. Sounds to me like it is using a menu through which it must scroll through which is the most problematic way of changing inputs. As Tranle suggested, go into Device mode for the TV and look to see if there are direct commands for each of the the inputs. For example, one may be called HDMI1, or Component2, etc. If these exist among your commands for the TV, try selecting one and see if the TV changes to that input. If it does then re-set up that activity using the discrete input commands instead of the menu and your good to go.
LG 42LB5600, Sony BDP-S590, Pioneer VSX-1019 AH-K, JBL LX22, Definitive Technology ProCenter 1000, Polk DSWPro400, Polk OWM3, Logitech Squeezbox Classic, Squeezebox Radio