HTTP Web Server: Unknown Command Exception

Is possible to use the Template Mail Combined R4.6 with a Domino Server 6.5.1?There is a error when user delete a message in a browser: “HTTP Web Server Unknown Command Exception”.

Server: Domino 6.5.1 - Intel Windows 2000 Server

Client: Linux Slackware 7.0 with Netscape 4.77

Thanks,

Hiro.