Due to Some Copyright made by Arvid by the looks of it (as hes always trying to ruin stuff)
Maps & Pub files have been removed from all downloads of Seose & EOServ
You can go to your Endless online folder (C:/program files/EndlessOnline/) and copy the maps and pubs out of that, but thats breaching copyright,
you can legaly make your maps using eoMapEditAlpha5 designed by rena, and make your own pub files using renas pubedit.
Unless you have both maps and pub files (You only need atleast one map, but all pub files (Eif, Enf, Esf, and Ecf)) the server wont run properly
Here! is a guide to making maps by Ardvarks
Here! is all of renas downloads, mapedit 5 is the latest.
hope i helped