Java Webstart not working on Lion

Hi,
I bought Lion yesterday, and then did a clean install (by copying the InstallESD file on a DVD and partitioning the whole drive again) on my iMac.
Everything seemed to be working fine, except Java. I Installed Java, from the Mac update menu (by going to Java prefs first), and some webapps based on Java that i use are working fine, but the most important doesn't.
It's ProRealTime, a financial charting application based on java. I download the webstart (.jnlp) file and open it, i see the app icon coming on the dock, and just when it tries to open, the app crashes and gives me an error.
I've contacted ProRealTime, and been talking to them since yesterday, and they say it's an issue with the Java version for Lion, and its apple who has to fix it.
Anyone has any idea, on how i could get it to work , or what should i do ?
I went back to my last Time machine backup of Snow Leoaprd, and won't upgrade to Lion again until Java works well again.
I don't understand why this time apple didn't include java directly with the OS, like in previous versions. For my work, a well working java is probably the most important feature that i need on my work imac. It's not so important for my other macs, that's why i'll still upgrade there, but it's crucial for work.
I'll really appreciate any comment or ideas.
Thanks in advance !

Hi again,
After days of researching, installing and uninstalling everything, everywhere i've found what causes this problem.
I installed Lion on my mac mini at home, and prorealtime (java) was working perfectly fine. So then i installed Lion again on my office imac, and tried again. At first Java was working fine, and i could use ProRealtime. But then, after installing all the other apps and drivers i tried again and it crashed like before. The only main difference between my imac and mac mini is a driver i have in my imac, called Displaylink. It's for using an extra screen through a USB to DVI adapter (i have 2 extra monitors on my imac, one connected directly and the other connected through this USB adapter).
So then, i uninstalled this Displaylink driver, and tried Prorealtime again, and it was working perfectly. So clearly the issue is created by a conflict between the displaylink drivers (and my 3rd screen) and java for lion.
And for now it's an issue only with java, since the drivers work fine when i installed them and i could see and use the 3rd screen like in Snow Leopard. But when i use this java app they create me this issue.
I've sent feedback to Displaylink but as always, i'm open to any suggestion , anyone could have about this.
As i said before i really need ProRealtime to work properly (which means with all 2 extra screens).
Thanks !!

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