Cracking SHA when I know the salt - is this the right way?

I've cracked some hashes and the results looks like this:
pass1234
dog1234
banjo1234
etc,
So I know that the salt is 1234 appended at the end of the password.
Now, I fire up cudaHashCat and enter this:

Is this the correct way? It doesn't seem to progress - Recovered (0%), Digests (0%), Speed 0h/s.