Problem with font

I have a problem with font.The following is my font template
<fo:inline font-size="{$size}" font-family="{$face}"
      color="{$color}" line-height="12pt">
      <xsl:apply-templates select="*|text()"/>
 </fo:inline>

I have problem with large font size .Suppose I am using the size as 12pt,if
the content is more than that one line
,the top of the second line will appear overwritten on the first line.I
tried with line-height.But there is no affect.
I increased the line-heght to 50 or more ,there is no line space between the
first and second line.How can I solve this problem.Please help me...

Thanks in advance
George



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