Trying to start angoca/db2-instance:instance-server_t

[ksrinivs64]

sudo docker run -i -t --privileged=true --name="db2inst1" -p 50000:50000 -v /tmp/db2:/home angoca/db2-instance:instance-server_t. I get:
exec: "db2": executable file not found in $PATH2015/02/17 14:28:14 Error response from daemon: Cannot start container 65c8c962f0295984be08c0c119a5a2e99c6c686b088bde64f547ff8d7562d93e: exec: "db2": executable file not found in $PATH
Any idea what might be wrong?