Consensus on proper wiring for Cortex M 10 Pin JTAG Connector
This is the official ARM Cortex JTAG/SWD connector diagram:



You should follow the data sheet/user manual about any resistors that are required. SWD pins on other LPC chips are usually pulled up internally.

The LPCXpresso IDE might be defaulting to the SWD interface. You need to select the JTAG interface, which is probably what the LPC4337 uses initially.