unable to connect to the database error=99

Dears

I Installed SQL 2012 64bit SP1 on the default path and I Installed Sage ERP 300 on the C:\

now when I connect the data base created in the Sql with the sage database via Database Setup the Error appear as follow:

unable to connect to the database error=99

I tried all methods to connect the databases and the all was fail connect.

I hope to find the solution for this issue ASAP

Regards......