CSS conflict with template?

Hi!

Yesterday I installed the EasyDiscuss extension, and it seems to be working just fine

But I have an issue with the display of the discussion sites on my web page. Take a look at the link below, and you'll see that the images/icons are missing in the tool/menu line (that is: the line/bar with options to choose "discussions", "categories", "tags" and so on). There is nothing wrong with the links from this tool/menu bar - but I can't see the actual icons, and this problems of course makes the tool/menu bar very hidden to the users.

Take a look here to see the issue.

I am not sure if the issue is present in all browsers. Currently I use Internet Explorer 9.

I guess the display issue is caused by some CSS conflict with the template, and I need some advice on how to resolve this issue.

I use Joomla 2.5.19, and have a fully updated Rocket Theme template: Ximenia.

I can provide you with admin access information if you need it, but then need to know where to post it (a mail adress or other secure way of leaving it to you).

Thank you very much for your response in advance.