Is it OK now? What problem do you have?
One thing to consider is that the DAS can only be started using the DB2 Admin Server userid, although it is usually auto-started. The default DB2 Admin Server userid is dasusr1. This is different than the default instance owner id, which is db2inst1.
I have also found in some installations, that reboots are necessary to successfully complete all the installation steps, even though they this is not documented in the readme file.
One other point, if you have installed your own java, rather than let DB2 install it, is to make sure that you have run the following to update both the instance and the das:
db2 update dbm cfg using jdk_path /opt/IBMJava2-141
db2 update admin cfg using jdk_path /opt/IBMJava2-141
Note: you java path will be different depending on which version you have and the operating system (the above is what I use for Linux).