internal error: SHA-1 not available — Sony Ericsson P800, P900 and P910

Hi,

I'm trying to use develop a small PersonalJava application which uses a 3rd party API to login securely to an external account.

It works using native JDK1.1.8 but doesn't work using UIQ emulator or on my P800 - I get the message "internal error: SHA-1 not available"

Is there any way to get this working?
I notice that classes.zip for UIQ doesn't include java.security package so I tried adding it but without sucess.

Thanks

Chris
-=-=-

PS - there is nothing within my code that uses security, it is all hidden within the 3rd party API