Dagon Design add sig form turns black

Hi,

I have installed an opt in form plug in from Dagon but when I tested it on my posts the text “Name” and “Email” are barely visible and when you click in the box it turns black. You can see it at the bottom of the post here:

https://www.photobloggerme.com/photoblog/2011/11/23/changing-colours-for-fun-in-photoshop/

The java code is under “Settings” ” Add sig” and pasted into the primary signature box. Any idea why this doesn’t display properly?

Thanks.