is your cache doing ip spoofing ?
If so, follow the following example
http://www.cisco.com/en/US/products/hw/contnetw/ps546/products_configuration_example09186a00801adbe2.shtml
Also, for troubleshooting do a 'sho summary' and verify that you have hits on your content rule.
With all your bypass acl, not sure if there is a hit.
If there is a hit, check if the traffic is forwarded to the cache [verify counters on the cache] or use a sniffer.
Verify that the cache is opening a connection to the destination [sniffer].
Gilles.