Border I don’t want around TEXTBOX vml-object

Hi, i'm new, hope to be writing in the right place.

I've tried to fix a problem for two weeks, and now I'm going out of my mind.

M_aybe it's simple:

I'm creating an email containing images, and text over the images. Obviously, using the simple HTML with table-tr-td doesn't work with most of users (especially for those who use Outlook). I starded working with VML. Now I have a rendering problem when sending from Outlook to Apple Mail. I think the TEXTBOX generate a border, or a margin, as soon as I write some text inside it.

Here's the code:

And here how it renders: http://i.imgur.com/Twbra.png

You can notice that gray border around the text...