border in image

i am trying to put to one image one border , with the 2 value with this:
<xsl:element name="img">
<xsl:attribute name="src">/images/cursos/<xsl:value-of
select="imagen"/></xsl:attribute>
<xsl:attribute name="hspace">3</xsl:attribute>
<xsl:attribute name="vspace">3</xsl:attribute>
<xsl:attribute name="align">right</xsl:attribute>
<xsl:attribute name="border">2</xsl:attribute>
</xsl:element>

but it doesn't put the border.

Can anybody help me to know how can i put the border?
Thanks



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