there are three things you should do
1) put the autoexe file (the admin file) in your dod folder so admin is enabeled in dods servers
2) its advised for a lot off things to bind admin menu
3) read up on the eg dods forum about specific kickable or offensive material in dods which you don't have in ins.
Dods is like ins also a source game so your not obligated to do the admin class again, for exemple if you would play bc2 or cod then an admin class would be advised due to a different admin system, for source games all admin classes are the same (or almost).
Besides that i hope to see you on the server!