mozilla-thunderbird-locale-it fails to install

[Giorgio Lazzari]

if i try to install mozilla-thunderbird-locale-ot via synaptic i receive 
this errormessage :
" mozilla-thunderbird-locale-it:  Dipende: mozilla-thunderbird but 
0.8-2ubuntu1 is to be installed"
 But i installed 0.8-2ubuntu1 !!!!

where is the problem ?

thank

Giorgio Lazzari