SAPI Error #1

Error: Invalid character at line 21

<sapi:choose>
        <sapi:when exp="1" title="Always true">
            <sapi:code title="display stylesheet and start DIV">
                <style>
                    a.inactive{
                        text-decoration: none;
                        font-weight: normal;
                    }
                    a.active{
                        font-weight: bold;
                        text-decoration: none;
                    }
                </style>
                <div style="width: 180px;">
            </sapi:code>
        </sapi:when>
        <sapi:when exp="1" title="Always true">    
            <sapi:for-each select="get_tree()" name="enum" title="Get tree data">
                <sapi:choose>
             <sapi:when exp="eq(this.this.currentpage.value,1)" title="if current document">
                        <sapi:apply name="this.this.spacer.value" /> › <a class="active" sapi:href="this.this.HREF.value"><sapi:apply name="this.this.TITLE.value" /></a><br />
                        </sapi:code>
                    </sapi:when>
             <sapi:when exp="neq(this.this.currentpage.value,1)" title="if not current document">
                 <sapi:code title="display entry">
                        <sapi:apply name="this.this.spacer.value" />› <a class="inactive" sapi:href="this.this.HREF.value"><sapi:apply name="this.this.TITLE.value" /></a><br />
                        </sapi:code>
                    </sapi:when>
                </sapi:choose>
            </sapi:for-each>
        </sapi:when>
        <sapi:when exp="1" title="Always true">
            <sapi:code title="close DIV">
                </div>
            </sapi:code>
        </sapi:when>
    </sapi:choose>