Insert calendar/reminder object using Java client and Domino Java API

This is my code:

... 
doc = db.createDocument(); 
doc.appendItemValue 
        ("Form","Appointment"); 
doc.appendItemValue   
        ("AppointmentType","4") ; 
doc.appendItemValue   
        ("Principal",remoteuser) ; 
doc.appendItemValue 
        ("Chair",remoteuser) ; 
doc.appendItemValue 
        ("From",this.remoteuser) ; 
doc.appendItemValue 
 ("Subject","java client reminder") ; 
doc.appendItemValue 
 ("Location","paris") ; 
doc.appendItemValue 
 ("Body","body body") ; 
Session stmp = db.getParent(); 
DateTime currTime = 
 stmp.createDateTime(Utility.getNow()); 
currTime.setNow(); 
currTime.adjustHour(1, true); 
doc.appendItemValue 
    ("CalendarDateTime",currTime) ; 
doc.appendItemValue 
    ("StartDate",currTime) ; 
doc.appendItemValue 
    ("StartTime",currTime) ; 
doc.appendItemValue 
    ("StartDateTime",currTime) ; 
currTime.adjustHour(1, true); 
doc.appendItemValue 
    ("$NoPurge",currTime) ; 

doc.appendItemValue 
 ("LocalTimeZone","Z=-1$DO=1$DL=3 -1 
1 10 -1 1$ZN=Western/Central Europe") ; 
doc.appendItemValue 
 ("StartTimeZone","Z=-1$DO=1$DL=3 -1 
1 10 -1 1$ZN=Western/Central Europe") ; 
doc.appendItemValue 
 ("EndTimeZone","Z=-1$DO=1$DL=3 -1 
1 10 -1 1$ZN=Western/Central Europe") ; 

doc.appendItemValue 
 ("_ViewIcon",new Integer(10)) ; 
doc.appendItemValue 
 ("SequenceNum",new Integer(1)) ; 
doc.appendItemValue 
 ("ExcludeFromView","D") ; 
doc.appendItemValue 
 ("OrgTable","C0") ; 
doc.appendItemValue 
 ("OrgConfidential","0") ; 

doc.computeWithForm(true, true); 
doc.save(true, true, true); 

.... 
------------- 

I have the following error:

The validation fails (computeWithForm throws an error).