BIG_IP 11.5 PROBLEMS WITH CIPHERS

i have a big-ip ver.11.5 i do the ssllabs.com test and it show me a F grade of my page, the problem is about PODDLE TLS, them i put the cipher !SSLv3:RC4-SHA and the poddle problem is solved but appear new vulnerabilities about weak Diffie-Hellman (DH) key exchange parameters, and when i try with other ciphers it can't solve both, only one.

please anyone can help me with this issue?