Deployment Error

HI ,

When i am deploying the application in NWDS it displaying the following error.

"Server oin140 did not accept login request as admin on port 55618. Details: ERROR: Could not establish connection to server oin140 at port 55618: oin140"

Host and port are correct,SDM is running, I dont know why it showing this error.Earlier when i am deploying the application its working fine.Today it showing this error.

Can anybody give me idea regarding this issue.

Thanks,

Prasad