Ungiuded stills and registax?

[JB80]

Being such a nice day I thought I would get some still shots of the sun and see if I could stack them, but being unguided seems to be a problem and the stacked image comes out a blur like below.

I have tried the moon and the same thing occurs, so I guess it's an alignment issue. I was using a sunspot as a reference point or a prominent crater on the moon and it always comes out like this.

Registax seems to allow for more movements with the planets but as soon as I use a bigger target it goes like this.

I'm probably missing something important.

Any Ideas?

Jarrod.