Unhappy Wifi Problem : Obtaining IP Infinite Loop

Hi all

I have wifi problems with my Samsung Galaxy Y PRO ( = qwerty ) SINGLE Sim GT-B5110
After an hard reset ( factory reset ) wifi fails obtaining IP number ( infinite loop : phone writes " obtaining IP address " ) from WLAN .

Phone specs :

PDA : B5510XXKJ4
PHONE : B5510XXKJ2
CSC : B5510OXAKJ2

How can I resolve it ( If someone has a rom STOCK italian version could give me the link for downloading ? maybe can I reflash rom .. )

Thanks in advance

ikar0