open file admin/articles.php
change:
<tr>
<td class="main" valign="top"><?php echo tep_image(DIR_WS_CATALOG_LANGUAGES . $languages[$i]['directory'] . '/images/' . $languages[$i]['image'], $languages[$i]['name']); ?> </td>
<td class="main"><?php echo tep_draw_textarea_field('articles_head_desc_tag[' . $languages[$i]['id'] . ']', 'soft', '70', '5', (isset($articles_head_desc_tag[$languages[$i]['id']]) ? $articles_head_desc_tag[$languages[$i]['id']] : tep_get_articles_head_desc_tag($aInfo->articles_id, $languages[$i]['id']))); ?></td>
</tr>
from:
<tr>
<td class="main" valign="top"><?php echo tep_image(DIR_WS_CATALOG_LANGUAGES . $languages[$i]['directory'] . '/images/' . $languages[$i]['image'], $languages[$i]['name']); ?> </td>
<?php if (FCK_EDITOR == 'true') { ?>
<td class="main"><?php echo tep_draw_fckeditor('articles_head_desc_tag[' . $languages[$i]['id'] . ']','700','300',(isset($articles_description[$languages[$i]['id']]) ? $articles_description[$languages[$i]['id']] : tep_get_articles_description($aInfo->articles_id, $languages[$i]['id']))); ?></td>
<?php } else { ?>
<td class="main"><?php echo tep_draw_textarea_field('articles_head_desc_tag[' . $languages[$i]['id'] . ']', 'soft', '70', '5', (isset($articles_head_desc_tag[$languages[$i]['id']]) ? $articles_head_desc_tag[$languages[$i]['id']] : tep_get_articles_head_desc_tag($aInfo->articles_id, $languages[$i]['id']))); ?></td>
<?php } ?>
</tr>
ALL