xsl:if @attribute + xsl:variable not working

Hi all:
why if

<xsl:for-each select="area">
    <xsl:if test="@position = 1">
      <xsl:variable name="color" select="'#FFF7A0'"/>
    </xsl:if>
    <xsl:if test="@position = 2">
      <xsl:variable name="color" select="'#FF980F"/>
    </xsl:if>

<td bgcolor="{$color}">dadada asda</td>

</xsl:for-each>

I get this?

"A reference to variable or parameter 'colortabla' cannot be resolved.
The variable or parameter may not be defined, or it may not be in scope."

-> the variable IS in scope (if I define it without xsl:if it works)
xml -> <area position="1"> or <area position="2">


thanks in advance

Aniceto Lopez




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