undefined reference to `PK11_CopyToSlot'

Hi ,
 I am trying to use this method to move my symmetric key to the key
for wrapping.
 when I use this method , I get
undefined reference to `PK11_CopyToSlot' collect2: ld returned 1 exit
status
which is linker error.
I am including the pk11priv.h file.
I have the latest nss library  after using
su -c 'yum update nss' on my fedora linux.
What Can I do to get rid of this error?
Thanks
-A
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