You have to start the wallet after customizing riecoin.conf, specifying:

rpcuser=blah
rpcpassword=blahblah
rpcport=1111
server=1

Then connect to it with the rminerd using 'rminerd.exe -o 127.0.0.1:1111 -u blah -p blahblah'

It should show hashing going on if it's working properly.