Rose,
something went wrong in your application, this could be:
1) Application missing info.
2) You did not submit all required forms.
3) You did not submit all needed doc's, only if you sent your forms by Mail.
I dedicated to give max info in this board for free, but in your case, you need an agent or lawyer to revise your submitted Info to DIAC, and to update your file. I can do this and will not be free of charge.
This board to give you an advise free not to review your case.
you can E-Mail me at :
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Fadel Fawzi
http://icuimmigration.com