The LPC2368 is an ARM7, i.e. a pre - Cortex-M device.
I have no experience with this device, so I'm not sure if the debug interface is compatible with JTAG, or to what extend.
At least the Segger website lists the core (Arm7TDMI-S) as supported by the J-Link device.
But Keil used to have a very active and helpful forum, perhaps I would ask there as well.