sql server - Group by and sum -

i having trouble getting sum of enrollment business_code same. code following:

select distinct lb.building_code ,  lb.bus_code, gl.building_name, gl.bus_name, sum(gl.enrollment) enrollment    table1 gl    right outer join table 2 lb on gl.building_key = lb.building_key   gl.bus_name = 'business'   , gl.year_cd = 2010   group lb.building_code,  lb.bus_code, gl.building_name, gl.bus_name, gl.enrollment 

current output:

building_code   bus_code    bus_name      enrollment   4581             0000       business    12 4581             0000       business    13 4581             0109       business b    100 4581             0109       business b    120  4581             0209       business c    130  4581             0402       business d    35  

desired output:

 building_code   bus_code    bus_name      enrollment       4581             0000       business    25     4581             0109       business b    220     4581             0209       business c    130      4581             0402       business d    35  

remove gl.building_name, gl.enrollment group by clause:

select    lb.building_code ,     lb.bus_code,    gl.bus_name,    sum(gl.enrollment) enrollment  table1 gl  right outer join table 2 lb on gl.building_key = lb.building_key gl.bus_name = 'business'   , gl.year_cd = 2010 group lb.building_code,  lb.bus_code, gl.bus_name;