I am using Arduino IDE 0022, so I already have the latest. I have my board selected correctly (Arduino Mega 2560) from the Tools - Board selection.
It is very odd. If I comment them everything uploads fine but with them uncommented it does not work. I tried adding the identifiers but that did not affect it at all. I wonder why it works differently on an Duemilanove (ie: it works). Are you using Windows or a different OS?
What is most frustrating is that without those lines it works fine. I have a whole webserver input/output sketch I have made that works fine and can be uploaded without trouble but I really want to have an alarm timer built in and this if statement is making that look doubtful.