HTTPS : server certificate -> error with IE5

[zze-messager FTM balr002]

Hello, 

I've got a server certificate for tomact generated by using the comand
keytool...

When i try to access to my web-app (https://locahost:8443/tutu), my browser
(IE5) send me a security alert : 

-> "The name on the server certificate does not corresponds to the name of
this  site" 

What can i do to avoid that ?

Thanks, 
delphine