The day you posted the uC/OS-II source code to this group I emailed you example working project for Olimex LPC2129, uC/OS-II, and IAR; not including OS source. Did you try this code? If not check your email.
Message
RE: [lpc2000] Urgent IAR EWARM with uCOS-II :-( ?
2006-03-14 by Joel Winarske