Please confirm if any Transportation Lane contains carriers and maintained properly.
Follow this sequence -
http://help.sap.com/saphelp_tm80/helpdata/en/39/d94eac4cd94de5b1e1b9a752362f89/content.htm
http://help.sap.com/saphelp_tm80/helpdata/en/e1/7beda3d08a4bff9bd80a8bf90dd3ea/content.htm
Also correctly maintain - Carrier selection profiles in NWBC
http://help.sap.com/saphelp_tm80/helpdata/en/e9/35629cd7684a2e8769002fe2bf9ebd/frameset.htm
Please provide further details.
Shivam.