Footer + Img + Link

Hello,

I'm having trouble inserting images in the footer or any widget.

When I put the code below works correctly:

<img src="http://mywebsite.com/blog/wp-content/themes/atahualpa367/images/facebook.gif">

But when I put the image link does not show more:

<a href="www.facebook.com"><img style="border: 0px solid ; width: 120px; height: 60px;" alt="" src="http://mywebsite.com/blog/wp-content/themes/atahualpa367/images/facebook.gif"></a>

I´m using Atahualpa 367 WP 312

Thanks