need help with php if/else

Hi,

With some help from all of you wonderful forum posters, I’ve come up with this for my header’s meta-description:

<?php if( is_home() ) : ?>
<meta name="description" content="Web Design, Web Development, and Search Engine Optimization in Columbus, Ohio" />

<?php else : ?>
<meta name="description" content="<?php the_excerpt() ?>" />

<?php endif; ?>

Now that I’m adding Ultimate Tag Warrior, I wanted to insert another condition that I thought would look like this:

<?php if( is_home() ) : ?>
<meta name="description" content="Web Design, Web Development, and Search Engine Optimization in Columbus, Ohio" />

<?php if( is_tag() ) : ?>
<meta name="description" content="You are now checking out all posts about <?php UTW_ShowCurrentTagSet('tagsetcommalist') ?>" />

<?php else : ?>
<meta name="description" content="<?php the_excerpt() ?>" />

<?php endif; ?>

But the whole site just breaks when I put that in… what am I missing?

Thanks soooo much to anyone who can help…

Brad