Unable to Connect to DataStore from CPI-PI Integration Flow

Hi,
We have created a DataStore(Using SQL Server Database) in our HCI DS Sandbox Client. We have also imported relevant tables under Import Objects functionality. Now, i want to use this DataStore/ DB Table to write data into it via CPI Integration Flow.

But, i don't see my DataStore under Manage DataStores Option. And i get a 500 Internal Server Error if i tried Select Operation passing the name of the DataStore.

How to fix it.
My Requirement is:
1. Get Data from The Integration Flow.
2. Insert/Update Entries in the Table( Connected via DataStore)with values found in 1.

Thanks