undefined reference to `RSA_generate_key_ex`'

[e0317]

 
 
hi,I am a new to Openssl .Today I wrote a programme with openssl and compliled 
in fc4.this is my command
"gcc -o crl crl.c -I/usr/local/openssl/include  -Wall -L/usr/local/openssl/lib  
-lssl -lcrypto"
libssl and libcrypto are also in the right place but ' undefined reference to 
RSA_generate_key_ex' occured
 
/tmp/ccoRcOnQ.o(.text+0x5c): In function `main':
crl.c: undefined reference to `RSA_generate_key_ex`'
 
i don't know why.Can you help me ?thank you very much