Need Help -- How to make Outer Join

Hi have three table , one table as master remaining two tables are detail. I want make outer join for these two details with master table ,

table names table 1 master , table2 & table3 as detail

table1(+) =table2 AND table1(+)=table3

i got this error

a table may be outer joined to at most one other table

Kindly help me to frame query for this situation

Use ANSI syntax which is easier to understand and less error prone.

select column1,...
from master
left outer join detail1
on master.keycolumn=detail1.fkcolumn
left outer join detail2
on master.keycolumn=detail2.fkcolumn

Thank U lot for helpme to frame the query

with regards,
E.Ramkumar