Wrong Colum Name

i am running this script
SELECT dbo.SHOVEL_A.HOLEID, dbo.Shovel_Hole.HOLEID AS shovel_id, dbo.SHOVEL_A.PROJECTCODE, dbo.Shovel_Hole.Shotname,
dbo.Shovel_Hole.B_FEET, dbo.Shovel_Hole.S_FEET, SQRT(square(dbo.SHOVEL_A.EAST - dbo.Shovel_Hole.EAST)
+ square(dbo.SHOVEL_A.NORTH - dbo.Shovel_Hole.NORTH)) AS distance_total
FROM dbo.SHOVEL_A FULL OUTER JOIN
dbo.Shovel_Hole ON dbo.SHOVEL_A.POLYGONO = dbo.Shovel_Hole.Shotname AND distance_total <= dbo.Shovel_Hole.B_FEET
GROUP BY dbo.SHOVEL_A.HOLEID, dbo.Shovel_Hole.HOLEID, dbo.Shovel_Hole.Shotname, dbo.Shovel_Hole.B_FEET, dbo.Shovel_Hole.S_FEET,
dbo.SHOVEL_A.PROJECTCODE, SQRT(square(dbo.SHOVEL_A.EAST - dbo.Shovel_Hole.EAST)
+ square(dbo.SHOVEL_A.NORTH - dbo.Shovel_Hole.NORTH))
HAVING (dbo.SHOVEL_A.PROJECTCODE = 'PRODL') AND (dbo.Shovel_Hole.Shotname = '20040524029')

but i have a result with the message that my colum name distance_total is wrong, so how can i fix that?

cheers
edwin