Siri not Recognising my contacts names

Hi,
I have an iphone 4 with siri instaled (ac!d + good serevr + ios 5.1.1 + JB).
Everythings works well, accept finding contacts.
I can ask questions, make a dictetion, but when asking to dail or text a contact,
she just creats words that sounds like the contacts but not realy using the conatcts list to make a selection.
it seams that siri does not know my conatcts list data base.
I hope some one can help
(10 mounth ago i had spire + server + ios 5.0.1 +JB and evrey thing worked great. but server lasted for 2 mounth only...)
my personal conatct name is in the siri setting, and she does not know my name, or any releshenship i have in my contact....
Raphi