Redirecting stderr from a launcher

I've made a desktop launcher and I want to direct the stderr to a file, but the redirection file isn't even create: /home/pl/my_thing.sh 2> /home/pl/stderr.txt That's what I've got in my launcher, but when I run it, the command executes normally, but acts as though it ignores everything from 2 onward. If I copy and paste that line into the command-line, it works. So why not in my launcher?