XML sitemap https problem

[XmapRedmar]

Xmap version 2.3.2
Joomla version 2.5.8
SSL -> force SSL -> entire site

Hi,
We have a full https site. The XML sitemap as generated by Xmap only uses a https link for the root of the site and all the other links are http. For example:

URL
https://www.example.com/
http://www.example.com/page1.html
http://www.example.com/page2.html

Any ideas how to fix this?