Hey ChiTownDiva,
"Object does not exist" is a very specific error, which can only be one of two things: (1) the object you're trying to query really doesn't exist (2) the user trying to query the object doesn't have the relevant privileges to see the object, as SurfingGecko has pointed out.
Because you say you can query the object successfully in your client, I'm presuming it can't be (1) - so it must be (2). When you test execution from the client, are you logging on with the same user Crystal is using to execute the report?
I'm pretty sure I've seen you post before regarding Oracle SPs, so I'm going to assume that you've read the whitepaper mentioned in this thread. But if you haven't yet, it's critical that you do follow the DOs and DO NOTs set out in the paper.
Naith