JRE crashing

I am creating a JApplet with a fairly extensive GUI. I run it fine on my local machine, but as soon as I try to open it (pointing via IP address) on another machine, the MS JVM tells me that the class is not found and Sun's JVM just crashes taking the browser window along with it. Or maybe it's the other way around. Anybody has any idea why or where to look for some kind of a log?

Same behaviour on 1.4.2_07 and 1.3.1_07.

Below please find the html file:

<h1>Pilot Applet test file</h1>

<hr>

<applet

archive=http://host.com/pilotapplet/spilotapplet.jar

code=ClasserApplet.class

name=ClasserApplet

width=750

height=550

>

PilotApplet

</applet>

<hr>

[912 byte] By [eugene_zaydens] at [2007-9-30 6:08:25]