I just took a look at your site, and I think there might be another possible answer:
You have had this site for 1½ year - on the net that's a long time.
Have you checked your competition lately..?

In any case, I noticed several things you could do:

LAYOUT:

Choose a consistent orientation: Either left-justified or centered.

Choose a consistent layout: Same pagemargins on all pages. Same space between columns.

Use a template to create subpages, instead of each subpage looking more or less different.
Keep a coherent style, and stick to a theme...

Make tablecell-borders invisible, and add space between paragraphs and columns;
much easier to overview. (Besides, visible tablestructures looks like 90ties design...)

As it is now, it's difficult to see the difference between links and highlighted text.
Reserve colours for links, and emphasize ordinary text otherwize (italics, bold, capitals).

CODE:

I found errors in every 2-3 line on your frontpage. And your subpages also seem to suffer.
Use a validation-prgram to spot and correct these html-errors. Try this: http://validator.w3.org/
If you use Firefox? Tidy is a very handy plugin...

Verify your links as well: http://validator.w3.org/

Your doctype is "Loose" - that signals old code.
Why not go for "Strict", and be futureproof..?

Your metatags are very basic - could be twice as many. How are your competitors doing it..?

Your images generally lack the ALT tag.

Consider using css, and avoid old proprietary tags.

Hope it all helps...

more regards from Copenhagen,
Mads Dam / www.mads-dam-larsen.dk/english.htm