[vulcan-works]

the end of product_details.tpl should look like this:

{if $active_modules.Extra_Fields ne ""}
{include file="modules/Extra_Fields/product_modify.tpl"}
{/if}

<TR>
  <TD colspan="3" align="center">
<INPUT type="submit" value=" {$lng.lbl_save} "></TD>
</TR>
<script type="text/javascript">
	var oFCKeditor = new FCKeditor( 'descr' ) ;
	oFCKeditor.ReplaceTextarea() ;
</script>
<script type="text/javascript">
	var oFCKeditor = new FCKeditor( 'fulldescr' ) ;
	oFCKeditor.ReplaceTextarea() ;
</script>
</FORM>

</TABLE>

{/capture}
{include file="dialog.tpl" title=$lng.lbl_product_details content=$smarty.capture.dialog extra="width=100%"}

Do the samples that come with fckeditor work? there in the "_samples" folder of your fckeditor folder, if they dont work it might be your server.