why is an <br> too in my title when i make a ticket from ejscript ?

Hi, i have a <br> in my title Ticket who appears but i don't write him.

%EJSCRIPT_START%<%
#setLanguageLevel 3;

String personid = getCgiVariable("personid");
String productName = getCgiVariable("productname");
String release = getCgiVariable("release");
String isUpdate = getCgiVariable("isupdate");
String rechnername = getCgiVariable("rechnername");
String windows = getCgiVariable("postDataWindows");

//Erstellt eine neue Ticket im System
Integer catId = 249; // _Intern/Installationsinfo
Integer catIdErstInstallation = 264;
Integer catIdUpdate = 265;
String myTitel = "Installation "+productName+" "+release;
myTitel = myTitel.substitute("<br>","");
myTitel = myTitel.substitute("\r\n","");

//Erstellt eine neue Ticket
Integer myTicketId = 0;
Ticket myTicket;
if(isUpdate.toLower() == "true")
{
  myTicket.setValue("category", catIdUpdate.toString());  
}
else
{
  myTicket.setValue("category", catIdErstInstallation.toString());  
}

myTicket.setValue("title", myTitel);
myTicket.setValue("ticketStatus", "6");
myTicket.setValue("status", "1");
myTicket.setValue("custId", personid);
myTicket.setValue("x_herkunft", "AKG-Desktop");
myTicket.setValue("x_systeminfo", rechnername +"\r\n"+windows);
myTicketId = myTicket.save();

//Hier muss nochmal den TicketStatus geändert sein
Ticket t;
t.load(myTicketId);
t.setValue("ticketStatus", "6");
t.save();

%>%EJSCRIPT_END%

I don't know why this <br> are here. Whenn I debug the code it's no <br> in the string but when i open the ticket the title is Installation Toto<br> 1.00.0161.

What can i do ?

thanks

Fabrice