read file using applet with premission for microsoft jvm and sun jvm

I would like to read file from client's pc using applet...for that i made applet with permissions:
com.ms.security.PolicyEngine.assertPermission(com.ms.security.PermissionID.FILEIO);

It works fine for microsoft jvm but for sun jvm it gives problem.....so i would like to know how to add file permission for sun jvm..
sandeepaherAsked:
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Giant2Commented:
>com.ms.security.PolicyEngine.assertPermission
is a permission of Microsoft
for Sun is different. See what permission the Applet request to you.

I suggest to use signed applet. This solution is more clear than others.

Bye, Giant.
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Giant2Commented:
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