SCO not maintaining connection

Hi,
i got a problem with sco connection . I wanted to establish an sco
socket connection without using l2cap , just like an SCO client-server code . Connect shows success , but after receiving few packets (raw audio) programme terminates with an error "connection reset by peer" . can anyone solve this issue. since l2cap can maintain the same socket connection for a long duration of time , how could the sco connection get disable after few seconds .

 Thanks&  regards