(Remember: to add your account to the database you should find at least one share)
EthDcrMiner64.exe -epool eth-eu1.nanopool.org:9999 -ewal 0x5236577AA0c989a2a21488f9966429498ec20dB1/I7/jondoe@me.com -epsw x -mode 1 -ftime 10
As they said, you need to wait until at least you give one share to the pool.
And you are doing wrong with your bat file, see suggestion by
whoismoses.
-snip-
EthDcrMiner64.exe -epool eth-eu1.nanopool.org:9999 -ewal 0x5236577aa0c989a2a21488f9966429498ec20db1.I7/jondoe@me.com -epsw x -mode 1 -ftime 10
replace
/ (slash) after wallet address with
. (dot)have you fixed it?