i am having some trouble getting some mods to work on my friends server. they work just fine in singleplayer, but not in multiplayer. For example, my elemental arrows mod and recipe book mod: in the server i go to craft the recipe, the finished item appears for a second and then disappears before i can grab it off the crafting table. i have modloader and modloadermp, but Rei's minimap is the only mod i can get to work on the server.
Not every mod works for multiplayer, if it does you need to install it on the server, not your client.
EDIT:
If your friend doesn't know how to install mods on a minecraft server, just install the mods as you normally would except with his minecraft_server.jar
my flying and lumberjack dont work as well.
EDIT:
If your friend doesn't know how to install mods on a minecraft server, just install the mods as you normally would except with his minecraft_server.jar
Not your minecraft.jar