I did not tell you to add an argument responseContent, I said
Your getphp procedure is the event handler for the Timer event. Both the event and event handler do not have any argument, fetchMessage is the event handler for the GotText event. Both have 4 arguments.
What about
As you are trying to call the alarmmanager extension from the background, you first have to set the start mode in your main background procedure console
Also it would make sense to register the Alarmmanager1.Started event to find out, if the alarm time could have been set correctly or if an error ocurred.
Again: use logcat for debugging
Taifun