Your EQ client and the server you are trying to run are not compatible. Assuming that you are patched just prior to the 18th, and you can't compile the source yourself, Richardo posted a link to some 5.7DR3 binaries at:
Everquest is a registered trademark of Daybreak Game Company LLC.
EQEmulator is not associated or affiliated in any way with Daybreak Game Company LLC.
Except where otherwise noted, this site is licensed under a Creative Commons License.