Unable to insert link or use html editor

I have a new installation, using the Sunflower theme. I’ve not changed anything excep a couple of graphics.

When I am creating a post, I highlight the link phrase and click on the hyperlink button. The link window opens, but the last field label says {$lang_theme_insert_link_titlefield}:

It doesn’t matter if I put in a title or not, I do not get the link in the document when I press insert.

When I click on the html editor I get a blank window with {$lang_theme_code_title} above the text area, but none of the copy that I have typed is visible.

I’m using XP-Pro with Firefox 1.5.0.7. My host is 1&1 and I have WordPress in it’s own directory off the root directory. Everything else seems to be working fine, and I can manually enter html into the editor, but hopefully this will only bee a temporary requirement.

Any help is appreciated.

Thanks
Phoenix