Tekkit Server Cannot Find Item ID's

[DefectiveGrape]

Title: Tekkit Server Cannot Find Item ID's

Version: 3.1.2

OS: Windows 7

Java Version: Newest

Description of Problem:

When I attempt to spawn in an item from Tekkit I get the message "ID isn't an item"

Error Messages:

Error Log:

[theprolo]

Your client or server IDs are messed up, try redownloading both. You should be able to keep the world.

Try redownloading the client first, since that's the one most likely to have gone wrong.