JavaWebStart app doesn't start out of Internet Explorer

[M.K.A. Monster]

Hi everyone,
I have developed an application using JavaWebStart. I'm normally using the Mozilla Firebird browser. And everything works fine. But when my application is started from within Internet Explorer 6.0, I get the following error:
Internet Explorer cannot download todophant.jnlp from todophant.monster-internet.nl ...Internet Explorer was not able to open this site.
And when I launch it by using my clickoutcounter, JavaWebStart starts and gives the following error:
An error occurred while launching/running the application.
Category: Invalid Argument error
Could not load file/URL specified: C:\Documents and Settings\Jeroen Oosterlaar\Local Settings\Temporary Internet Files\Content.IE5\I10NMTE5\todophant[1].jnlp
It has something todo with IE and cache I suppose, but what?
I found out that others have the same problem:
http://forum.java.sun.com/thread.jsp?forum=38&thread=442779&tstart=150&trange=30
http://forum.java.sun.com/thread.jsp?forum=38&thread=442320&tstart=150&trange=30

But none has been solved.
Please has anyone an idea? My application can be started from: http://todophant.monster-internet.nl/todophant.jnlp
Regards,
Mark Monster

[M.K.A. Monster]

It worked for me when copying the jnlp-file to the root site www.monster-internet.nl the rest was where was before. Also the non-copy of the jnlp-file. It was a problem that IE didn't cache the things in the subdomain.