tow left outer join to same table

i am using sql server 2008 and have two tables (family_table) and(children_table) that are related by family_id , How do you count children that havestate 'a' or state 'c' and children that have state 'b' and != 'e' and != 'f' to each family via one query?

I tried query but the result of count of children_state is wrong , and i don't know where is the problem , my query is :

select f.family_id , 
count(c.family_id) as [A children Count] , 
count(cp.family_id) as [B children Count] FROM Family_table as f left outer join 
children_table as c on c.family_id = f.family_id and c.children_state = 'A'

or c.children_state = 'c' left outer join children_table as cp 
on cp.family_id = f.family_id and cp.children_state = 'B' and cp.children_state <> 'e'

and cp.children_state <> 'f' group by f.family_id