Mac webstart and java 1.4

hello,
i am having trouble with using an app designed for java 1.4 on the mac with webstart. Basically it works fine when launching from the JNLP, but when the user creates a desktop icon for it, the mac wants to run java 1.3 instead, thereby failing. it basically sits there catatonic for a while and the exception is tossed to the console, so it is very bewildering behavior.
is there a workaround for this (other than making the app work on both 1.3 and 1.4)?
thanks,
james

this happens for an app i wrote, too, only all of the macs worked fine on java 1.3. then they all upgraded to 1.4, then the only way they can run the apps is thru the webstart console. anyone have any recommendations?
ds

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