Can't move a file in batch.

Hi all, I need to process some files then move them to a different location, all this done in batch. It works fine outside of batch, but I cant seems to figure out why it wont run in batch. The file locations are on the server, and I have full access.

 public void moveFile()

{

    FilePath            fpath;

    Filename            fname;

    InteropPermission   interopPerm;

    FileIOPermission    filepermission;

    Set                 permissionSet;

    fpath = @'\\Server\Test\test.ord';

    fname = @'\\Server\Test\TestArchive\test.ord';

    filepermission = new FileIOPermission(fname, 'RW');

    interopPerm = new InteropPermission(InteropKind::ClrInterop);

    permissionSet = new Set(Types::Class);

    permissionSet.add(interopPerm);

    permissionSet.add(filepermission);

    CodeAccessPermission::assertMultiple(permissionSet);

    System.IO.File::Copy(fpath,fname);

    CodeAccessPermission::revertAssert();

    /*interopPerm = new InteropPermission(InteropKind::ClrInterop);

    interopPerm.assert();

    System.IO.File::Copy(fpath,fname);*/

}

I've set the RunOn propetrty to calledFrom, client and server, but none seem to have any effect. Any ideas?