Hi,
Forgot to say If you couldn't able to deploy from NWDS other option is sharing EAR file to basis to deploy .
right click on EAR project -->export-->j2ee-->EAR file-->give the name and your loc machine path .
You can deploy from NWDS if you have right credentials to access to your PI machine .I always succeeded in deploying from NWDS.
Regards
Venkat