Yeah, I'm going to have to agree with tampabay. The current nuke programs out there can really compromise your security. It would probably be in your best interest, security wise, to stay away from them completely.

But as for your questions, you may want to check to see if you have all of your file and folder permissions set correctly. If not, you won't have the ability to write to files you may need to. Also, make sure that your cookies are adjusted properly. You would refer to your nuke manual/read me to see how you would set that up.