Unhappy [Q] Nexus s Stucked in start

Hi, Guyx..... I have a google nexus s gsm. I have installed twrp 2.6.0 somehow. then Helly bean rom. In last past days Unfortunately my mobile phone couldnt connect to my laptop and giving notification of

"Devise not recognized"


i m using win 7. and after some days when i was restarting my phone my mobile stuck in opening where helly bean mark circle rotates. this happened, before but that time i mounted it through twrp and installed rom again and my problem was gone. But now when my phone is not connecting to laptop, i dnt knw how to install the rom. As u knw nexus s dnt have card slut. Please help me wat to do i much worried. Plzzz guyx