Bitcoin version 0.5.1-beta

EXCEPTION: St13runtime_error
-rpcssl=1, but bitcoin compiled without full openssl libraries.
bitcoin in ThreadRPCServer()

terminate called after throwing an instance of 'std::runtime_error'
what(): -rpcssl=1, but bitcoin compiled without full openssl libraries.
Aborted

ec2-user@ip-XX-XXX-XX-XX ~]$ cat .bitcoin/bitcoin.conf
rpcallowip=*
rpcssl=1
server=1
rpcuser=XXXXXX
rpcpassword=XXXXXXX
rpctimeout=30
rpcsslciphers=DEFAULT:@strength

related:#687