Hello.

[GM-Pandora]

sdata is important, I don't have a data.grf either.

Unregistered id means the account you're trying is not registered.

You only need to put the _M or _F the first time, then remove it, if it gives you that message, it means it did not create the account in the first place, try again with the _M or _F.

If you can't make it work, pm me the account name you are trying to register and I'll look in the database.

Also make sure you are using hero.exe to play.

[Miguel]

I made an ID before on a different computer.

Edit: And, I just checked my RO folder and the files data.grf and sdata.grf are there.

[Miguel]

Help me please..

[GM-Pandora]

I told you, make sure you have the files from the september patch:
http://pandoraonline.net/forum/showthread.php?tid=2097

and if you have a data folder, rename or remove it.