composite device msd+hid

hello my friends!

I want to implement Atmel composite device code (msd+hid) on at91sam7s256.
I downloaded the software package and tried to implement usb mass storage first, it worked correctly in IAR but when I use keil version of it computer recognize a removable device but can't format it.

1- why the keil version of usb mass storage does'nt work but IAR version , works correctly without any need to change code ?
2- Is there any configuration about keil that is need for this to set?

another problem is that *all of composite sample codes both in IAR and Keil doesn't work* what is the problem?

please help me!! thanks for your attention!!!!

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