Line height not working at OKCTERMS constumization

Hello guys, how are you doing?

I'm trying to implement a customization at contract template for purchasing module. The base file is OKCTERMS_en of Contracts Core.

I'm trying to apply line-height at block level but nothing happens... if I try another attributes it works, like applying background-color (attachment). Does anyone know what could be the issue? I'm using 200% at below example but it not work with any value.

<!-- Here is the block with customized attributes--><fo:block line-height="200%" background-color="red" font-size="{$defaultFontSize}" padding-top="5pt" padding-bottom="10pt" font-family="{$defaultFont}"  font="{$font}" white-space-collapse="false" linefeed-treatment="preserve" text-align="justify" >     <xsl:choose>          <xsl:when test="InsertByReference='Y'">               <xsl:apply-templates select="ReferenceText"/>          </xsl:when>          <xsl:otherwise>               <xsl:apply-templates  select="ArticleText"/>