what is wrong with my niosII5.0

hello:

I have download niosII 5.0 builde 73c from and Qii5.0 full version from altera . when I installed niosII 5.0 after installing QII5.0 only , then pop a dialog which indicated that I should install IP CORE: ddr_ddr2_sram before or after , I didn't do it.

after completing above , I designed a project *.qsf and the hardware desinging is successful. then I start the "IDE" to design a software based on the project *.qsf , following the steps below:

1> file->new->C/c++ application

2>next

3>named the file: hello_world choose the suitable "ptf file and cpu" select the file temple: hello_world

4>next

5>finish

6>right click and choose "builde project"

it is successful.

but now I want to fix RTOS ,then

choosing the file "hello_world" , right click and choose system library propersity ,under the SYSLIB, the RTOS lists is only "none(signal thread)" and the uc/os didn't appear, I remember clearly that In Q4.1 and NiosII1.1 when I did this the RTOS include "none " and "uc/os" ,what wrong is it ?

meanwhile I open the /../kits/nios2/software , I didn't find the files about u/cos ,but in QII4.1 and NIOSII1.1 they exists, why?

the os of my computer is XP sp2

how can I do for it ?

thanks