Using the method described here (http://www.movabletype.org/support/?act=ST&f=14&t=5934&) to go back and forward with individual entries within a category, I encounter the problem where the back link works fine, but the forward link only goes to the most recent entry, and not the next entry. How can this be fixed?

CODE
<td><div align="left" id="menu"> <MTSQLEntries query="SELECT entry_id FROM mt_entry, mt_placement, mt_category WHERE entry_id < '<MTEntryID>' AND category_label = '<MTEntryCategory>' AND category_id = placement_category_id AND entry_id = placement_entry_id ORDER BY entry_id DESC LIMIT 1">
<MTIfNotEmpty var="EntryLink">
<a href="<MTEntryLink>#slideshow">« <MTEntryTitle></a>
</MTIfNotEmpty>
</MTSQLEntries></div></td>
                 <td><div align="right" id="menu"><MTSQLEntries query="SELECT entry_id FROM mt_entry, mt_placement, mt_category WHERE entry_id > '<MTEntryID>' AND category_label = '<MTEntryCategory>' AND category_id = placement_category_id AND entry_id = placement_entry_id GROUP BY entry_id DESC LIMIT 1">
<MTIfNotEmpty var="EntryLink">
<a href="<MTEntryLink>#slideshow"><MTEntryTitle> »</a>
</MTIfNotEmpty>
</MTSQLEntries></div></td>


Thanks!
Chloe