Comment on WordPress Header Images by SEO Dave.
1st Stallion ideally would be installed under the folder
You have it under
I guess you’ve used FTP and uploaded the extracted zip folder /stallion-theme-7.1.1(1)/ which includes the folder /stallion-seo-theme/, you should only upload the folder /stallion-seo-theme/
2nd you have brackets in the folder name, I don’t think that’s valid for folders holding themes.
I’d activate the TwentyTwelve theme, delete the entire folder
Reinstall Stallion (only this folder from your PC /stallion-seo-theme/) into