LPATCH.EXE is not something I am aware of. It's obvious that English is not your native language, so maybe it is something specific to your locale. Can you connect to Sony's servers and play a character? That's the only requirement these days for connecting to the latest EQEMu.
There's a post in the Tutorial section that explains how to connect:
http://forums.eqemu.net/viewtopic.php?t=9649.