I'm having trouble generating a sitemap with all urls as non-ssl (http not https).

I currently use a plug-in on my site to force URLs as non-SSL (because so many errors appear if I use SSL).

In the back end, even if I log in as administrator in a non-SSL URL, the sitemap is produced as all https - which throws all kinds of errors in the SEO spider and "analyse sitemap links" as all pages appear as 301 redirects.

Is there a way to fix this?

Thanks!