Блок не тянется по высоте - Вопросы по CSS

<div id="mb">
	<?php if($this->countModules('top-left')) : ?>
		<div id="top-left"><jdoc:include type="modules" name="top-left" style="xhtml" /></div>

	<?php endif; ?>
	<?php if($this->countModules('cslide')) : ?>
		<div id="cslide"><jdoc:include type="modules" name="cslide" style="xhtml" /></div>

	<?php endif; ?>
	<div id="container">
		<div id="content">
			<div id="user3"><jdoc:include type="modules" name="user3" style="xhtml" /></div>
			<div id="fp"><jdoc:include type="component" /></div>
			<div id="user4"><jdoc:include type="modules" name="user4" style="xhtml" /></div>
		</div>
		<div id="left-col">
			<?php if($this->countModules('user7')) : ?>
				<div id="user7"><jdoc:include type="modules" name="user7" style="xhtml" /></div>
			<?php endif; ?>

			<?php if($this->countModules('left')) : ?>
				<div id="left"><jdoc:include type="modules" name="left" style="xhtml" /></div>
			<?php endif; ?>

			<?php if($this->countModules('user8')) : ?>
				<div id="user8"><jdoc:include type="modules" name="user7" style="xhtml" /></div>
			<?php endif; ?>
		</div>
	</div>
	<div id="right-col">
			<?php if($this->countModules('user5')) : ?>
				<div id="user5"><jdoc:include type="modules" name="user5" style="xhtml" /></div>
			<?php endif; ?>

			<?php if($this->countModules('right')) : ?>
				<div id="right"><jdoc:include type="modules" name="right" style="xhtml" /></div>
			<?php endif; ?>

			<?php if($this->countModules('user6')) : ?>
				<div id="user6"><jdoc:include type="modules" name="user6" style="xhtml" /></div>
			<?php endif; ?>
	</div>
<dic class="clr"></div>
</div>