triplets

[jutta]

Hi,
I need some help with triplets. I want to have 3 triplets in one measure. Each 
triplet consists of bbg (example below). So each triplet should be beamed 
individually. But: what happens is that all 3 triplets are connected by one 
lang beam. What can I do?
 
Jutta
 
{
\time 3/4
\key g \major

\times 2/3 { b''8 b' g' }
\times 2/3 { b''8 b' g' }
\times 2/3 { b''8 b' g' }
}