How to avoid using traceroute -I option on servers behind BIGIPs

I work at Qwest and I'm doing the traceroute from our servers behind our BIGIPs. It seems that the BIGIP is doing something unexpected (from my perspective) with the UDP ICMP packets. I have a Standard UDP virtual server configured to forward all traffic and all ports. What is the best way for me to forward the UDP ICMP packets unfettered (and have the default traceroute report correctly) ?