Hi Prateek,
The Database drivers have been completely re-written in CR 9 so you have to manually update the reports to use MS SQL Native X driver.
If SQL is 2008 then use the Native 10 client and SQL 2012 then the Native 11 client.
Also, you can't CR 8.5 and any other version on the same PC, 8.5 is not side by side supported.
Verify the reports work first in CR 2013 manually then test in your app.
Also, use the VS installer from this link:
SAP Crystal Reports, developer version for Microsoft Visual Studio: Updates & Runtime Downloads
No SDK's are instlaled in CR 2011 or 2013, this link is the SDK for both.
Don