Connection could not established

[steward]

Hi,
im using version 2012 (7.3.4144.0) and upgrade to ASG 2015 as latest. but with same environment settings, connection check is successful. settings:
checked: Enter the location of the database
entered: Environment name
entered: database server
entered: database name
checked: Use integrated authentication

but when run the software, will get error: Connection could not be established. a connection to your current environment could not be established. please select another one. Could not find stored procedure 'Connection Test'.

any idea if this caused by incompatible database?

[DevOma]

You try to connect your old database directly - that's not possible. You need to create a new database and then select "Environment=>Upgrade from 2012"