Unfortunately, this is a problem with the Apple Push Notification Service (APNS) and jailbroken phones, so there isn't anything we can do that would affect the situation. If you search google for "jailbreak push notification" or "jailbreak push fix" you will find a lot more information about the problem.
I was under the impression that the issue had been fixed on the most recent versions of iPhone OS and the jailbreak software. Please make sure that your iPhone OS and your jailbreak is updated to the latest version.