Table header row help

[Jeremy Cowgar]

I cannot figure out what's wrong with the following table, the error  
I get is:

    15,4: @BeginHeaderComponent symbol ignored (out of place)
    24,4: @EndHeaderComponent symbol ignored (out of place)

The full example code:

@SysInclude { tbl }
@SysInclude { doc }

@Doc @Text @Begin

@CD @OneRow @Tbl
   aformat { @Cell A | @Cell B }
{
   @Rowa
      A { @I Header }
      B { @I Header }
      rulebelow { yes }
   @HeaderRowa
      A { @I Header }
      B { @I Header }
      rulebelow { yes }
   @Rowa
      A { Hello }
      B { Goodbye }
   @EndHeaderRow
}

@End @Text

Thank you,

Jeremy