Error con group by en esta consulta

[adryan310]

Hola gente,

tengo la siguiente consulta:

Código SQL:

SELECT *
FROM WAGERHEADER H, WAGERDETAIL D, GAME G
WHERE H.[IdWager] = D.[IdWager] AND 
      D.[IdGame] = G.[IdGame]   AND 
      H.[SettledDate] >= CONVERT(datetime,('2014-01-08 00:00:00')) AND 
      H.[SettledDate] <= CONVERT(datetime,('2014-01-09 00:00:00')) AND
      H.[IdAgent] = 7 GROUP BY H.[IdWager] ORDER BY H.[IdWager] DESC
 

Pero me da un error:

Column 'WAGERHEADER.IdLineType' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.

Saben a que se puede deber ese error ?