Can’t shut my car!

Hello, I have this radio on my Omega B yes. However, I have a problem… I can open my car with it, but I can’t close it with it. It can’t be at the soldering points, which I made about 10 minutes ago New batteries are also inside. Learning works perfectly, the locks go back and forth once, but if I want to close it then it doesn’t work. So I have to do with the lock! Also I can’t get the disc lock in, whether with the remote control or with the lock! Can it be because I have another radio installed? LG