Hello Rsoreo,
You will need to enable the remote to work with the HW-A430 Soundbar, follow these instructions below.
First, turn Off the Soundbar. Once powered off, push up and hold the WOOFER button for 5 seconds. Each time you push the WOOFER button up and hold it for 5 seconds, the mode switches in the following order: “OFF-TV REMOTE” (Default mode), “SAMSUNG-TV REMOTE”, “ALL-TV REMOTE”. Please also make sure your speaker settings on the TV are set to External Speaker.
Not all remotes are capable of controlling the soundbar.
~Samsung Solutions