Here are a few rounds that you might want to consider.
1) Make sure you are using universal Google. ( How? )
2) For new Google Analytics accounts, it will take up to 48 hours until you start using the measurement protocol.
3) Make sure that you install the User-Agent with the request
4) Make sure cid is a random UUID (version 4) as described at http://www.ietf.org/rfc/rfc4122.txt
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