Issue with the key trunk release button

I just bought my legacy 2 weeks ago and im having an issue with the trunk relase button on my key. it worked once or twice and sine then it stopped working. the lock/unlock buttons work fine. could this just need a new battery or what?

Make sure you don't have the trunk cancel switch in the glove box on. The remote only has 1 battery. If it was dead nothing would work. Do the lights flash and car chime?

everything on my key works fine but the trunk button .yeah it was a long shot thinking that the battery was dying but i had to try it ill go look in my glove box

the button in the glove box was in cancel mode...thanks now it wors just fine

No problem. Enjoy the new car.