You can try this....
1)
open file modules/boonex/poll/templates/base/css/main.css
and find this code
div.poll_block div.poll_section
{
float:left;
position:relative;
width:80%;
}
Edit width to 100%
2)
open file modules/boonex/poll/templates/base/poll_block.html
add and hide code as bellow
<bx_if:start_tag>
<div class="poll_block" id="poll_block__uid__">
</bx_if:start_tag>
<div class="pollThumb">
__poll_picture__
</div>
<!-- start new added code -->
<div id="dpol__uid__" class="pollBlock" >
<div id="dpol_caption___uid__" class="pollCaption">
<b><a href="__poll_url__"></a></b>
</div>
</div>
<!-- end new added code -->
<div class="poll_section">
<!-- poll's container -->
<div id="dpol__uid__" class="pollBlock" >
<!-- start hidden code -->
<!--<div id="dpol_caption___uid__" class="pollCaption">
<a href="__poll_url__"></a>
</div>-->
<!-- end hidden code -->
<div id="dpol_question___uid__" class="pollAnswerBlock">
<table cellspacing="0" cellpadding="0" align="left">
<tbody>
<tr>
<td class="corner"><img alt="corner" src="__l_t_side__"/></td>
<td class="spacer" style="background-image:url(__t_side__)"><img src="__spacer__" alt="spacer" /></td>
<td class="corner"><img alt="corner" src="__r_t_side__" /></td>
</tr>
<tr>
<td style="background-image:url(__l_m_side__)"><img src="__spacer__" alt="spacer" /></td>
<td class="poll">
<div class="poll_wrapper">
<div id="dpol_arr_m___uid__" class="pollSlBG"></div>
<div id="dpol_arr_up___uid__" class="pollUp" onmouseover="javascript: scroll_start(document.getElementById('dpol_question_text___uid__'), 'down');" onmouseout="javascript: scroll_stop();"><img src="__pool_up_src__" alt="poll up" /></div>
<div id="dpol_arr_down___uid__" class="pollDown" onmouseover="javascript: scroll_start(document.getElementById('dpol_question_text___uid__'), 'up');" onmouseout="javascript: scroll_stop();"><img src="__pool_down_src__" alt="pool down" /></div>
<div id="dpol_question_text___uid__" class="pollQuestionBlock"></div>
</div>
<div class="clear_both"></div>
</td>
<td style="background-image:url(__r_m_side__)"><img src="__spacer__" alt="spacer" /></td>
</tr>
<tr>
<td class="corner"><img alt="corner" src="__l_b_side__"/></td>
<td class="spacer" style="background-image:url(__b_side__)"><img src="__spacer__" alt="spacer" /></td>
<td class="corner"> <img alt="corner" src="__r_b_side__"/></td>
</tr>
</tbody>
</table>
</div>
</div>
<script type="text/javascript" language="javascript">
send_data( 'dpol_question_text___uid__', 'get_questions', '', '__uid__' );
</script>
<div class="poll_info">
<bx_if:manage_page>
<div class="manage_el">
<input type="checkbox" value="__uid__" name="poll_el[]"/>
</div>
</bx_if:manage_page>
<div class="owner_info">
__by__ __profile_link__ <span class="date_add">__date_add__</span>
</div>
<div class="result_section" id="result_block__uid__">
<a href="javascript:void(0);" onclick="PerformSubmit(__uid__, -1)">
__result__
</a>
</div>
<div class="back_poll_section" id="back_poll__uid__">
<a href="javascript:void(0);" onclick="getPollBlock('poll_block__uid__', '__uid__')">
__back__
</a>
</div>
<div class="clear_both"></div>
__actions__
</div>
</div>
<div class="clear_both"></div>
<bx_if:end_tag>
</div>
</bx_if:end_tag>