NEXTLINKIA and PREVLINKIA in Spanish navigation bar

Dear everybody,

I achieved to customize the NAV BAR to spanish by ajusting the 
rcfile. However, now I got stuck with the NEXTLINKIA and 
PREVLINKIA commands. It just won't work; instead it jumps to the 
directory index and lists the files in this directory. 

How can I get this work?

Please see below part of the rcfile I use:

<MSGHEAD>
<HR SIZE=1 NOSHADE WIDTH="100%">
<address>

</address>

<NextLink>
<LI>
<STRONG><A HREF="$MSG(NEXT)$">Siguiente mensaje por 
fecha</A></STRONG>,
<EM>$SUBJECT(NEXT)$</EM>
</LI>
</NextLink>

<PrevLink>
<LI>
<STRONG><A HREF="$MSG(PREV)$">Anterior mensaje por 
fecha</A></STRONG>,
<EM>$SUBJECT(PREV)$</EM
</LI>
</PrevLink>

<TNextLink>
<LI>
<STRONG><A HREF="$MSG(TNEXT)$">Siguiente mensaje por 
sequencia</A></STRONG>,
<EM>$SUBJECT(TNEXT)$</EM
</LI>
</TNextLink>

<TPrevLink>
<LI>
<STRONG><A HREF="$MSG(TPREV)$">Anterior mensaje por 
sequencia</A></STRONG>,
<EM>$SUBJECT(TPREV)$</EM
</LI>
</TPrevLink>

<NEXTLINKIA>
No hay
</NEXTLINKIA>

<PREVLINKIA>
No hay
</PREVLINKIA>

<HR SIZE=1 NOSHADE WIDTH="100%">
<br>
<FONT COLOR="#800000"><FONT SIZE=+1>Mensaje de 
</FONT></FONT><FONT COLOR="#000066"><FONT 
SIZE=+1><strong>$FROMNAME$</strong></FONT></FONT>
</MSGHEAD>

<TopLinks>

</TopLinks>

Many thanks in advance!
****************************

Bert Hiddink
FUNDACION GALILEO
Correo electronico: hiddink(_at_)sipromicro(_dot_)com
Sitio: www.sipromicro.com
Tel. +506 280 8683
Telefax. +506 280 8847

****************************