Crystal Reports Service Packs

My Crystal Reports Developer program that came with Vantage began
prompting today to install the latest service pack which is Service
Pack 3. However, when I try to install it, it states that it requires
Service Pack 2. I downloaded Service Pack 2 and tried to install it
but it states that I have another version of the product installed.
Has anyone patched Crystal Reports XI Release 2 successfully or suggest
a reason why it shouldn't be patched?

Thanks for any advice.

Tracey Roy
Network Administrator
The Dupps Company