Logic problem adding nodes to linked list

I seem to be having trouble with the logic in the following function. Calendar has a double-linked list of events, and I want to add events, and have them sorted upon being added. Unfortunately, when I test it, all of them are simply appended to the end of the list. To be honest, so far I haven't done more than three Events on a single execution.

Code:

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int Calendar::addEventSorted( Event NewEvent ) //Add events in order of date
{
        Event* pNewEvent;
        pNewEvent = new Event;
        if( !pNewEvent )
                return( -1 );
        pNewEvent->setID( NewEvent.getID() );
        pNewEvent->setTitle( NewEvent.getTitle() );
        pNewEvent->setDescription( NewEvent.getDescription() );
        pNewEvent->setStartTime( NewEvent.getStartTime() );
        pNewEvent->setEndTime( NewEvent.getEndTime() );
        pNewEvent->setReminderTime( NewEvent.getReminderTime() );
        pNewEvent->setRepeatCode( NewEvent.getRepeatCode() );
        pNewEvent->mpNext = 0;
        pNewEvent->mpPrevious = 0;

        if( !mpFirstEvent )
        {
                mpFirstEvent = mpLastEvent = pNewEvent;
                ++mNumberOfEvents;
                return( 0 );
        }
        Event* pEventScanner = mpFirstEvent;
        while( WhichTimeComesFirst( pEventScanner->getStartTime(), pNewEvent->getStartTime() ) == 1 )
                pEventScanner = pEventScanner->mpNext;
        pNewEvent->mpNext = pEventScanner;
        pNewEvent->mpPrevious = pEventScanner->mpPrevious;
        if( pEventScanner->mpPrevious )
                pEventScanner->mpPrevious->mpNext = pNewEvent;
        else
                mpFirstEvent = pNewEvent;
        pEventScanner->mpPrevious = pNewEvent;
        ++mNumberOfEvents;
        return( 0 );
}

int WhichTimeComesFirst( tm time1, tm time2 ) //If time1 is first, return 1, return 2 if time2 is first
{
        if( time1.tm_year < time2.tm_year )
                return( 1 );
        if( time1.tm_year > time2.tm_year )
                return( 2 );
        if( time1.tm_yday < time2.tm_yday )
                return( 1 );
        if( time1.tm_yday > time1.tm_yday )
                return( 2 );
        if( time1.tm_hour < time2.tm_hour )
                return( 1 );
        if( time1.tm_min > time2.tm_min )
                return( 2 );
        if( time1.tm_sec < time2.tm_sec )
                return( 1 );
        if( time1.tm_sec > time2.tm_sec )
                return( 2 );
        return( 0 ); //They happen at the same time
}

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