impossible to create a new sitemap and modified menu

[ecom]

Hi,
I installed xmap version 1.2.13 on joomla 1.5.15 with virtuemart 1.1.4. All seems be good, when I go in the component, I can't add a new site map because there is a # on the link. And I can't use option.
A little indication also, default.gif picture is broken.
Please give me you answer.
Thank's.