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Have you gone through below link, its apply for SQL 2008 but it same for SQL 2012 too<br />
<br />
<a href="http://skamie.wordpress.com/2012/01/16/sql-server-connectivity-error-sql-server-does-not-exist-or-access-denied/" rel="ugc">http://skamie.wordpress.com/2012/01/16/sql-server-connectivity-error-sql-server-does-not-exist-or-access-denied/</a>
</div>


Have you gone through below link, its apply for SQL 2008 but it same for SQL 2012 too

http://skamie.wordpress.com/2012/01/16/sql-server-connectivity-error-sql-server-does-not-exist-or-access-denied/ [http://skamie.wordpress.com/2012/01/16/sql-server-connectivity-error-sql-server-does-not-exist-or-access-denied/]

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Hi all. We managed to fix this. The SQL Browser service was disabled, we started this and everything started to work. Thanks for your help. <br />
<br />
Ryan
</div>


Hi all. We managed to fix this. The SQL Browser service was disabled, we started this and everything started to work. Thanks for your help.

Ryan

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great news please close question
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<div class="content wysiwyg-content">
Hi All,<br />
<br />
we have a problem with a clients server, basically they are running 2012 essentials with SQL 2012 - we have the database running and working on the server ok but the SQL string doesn't appear to let me client machines connection to it.<br />
<br />
The errors is:-<br />
<br />
Connection to SQL Server failed - [DBNETLIB][ConnectionOpen (Connect().[SQL Server does not exist or access denied.<br />
<br />
SQL String Used:-<br />
<br />
Provider=SQLOLEDB;Server=S<wbr />ERVERNAME\<wbr />SQLEXPRESS<wbr />;Database=<wbr />customer;T<wbr />rusted_Con<wbr />nection=ye<wbr />s; <br />
<br />
We have tried turning off the firewall with no luck.<br />
<br />
any ideas?<br />
<br />
thanks again
</div>
</div>


Hi All,

we have a problem with a clients server, basically they are running 2012 essentials with SQL 2012 - we have the database running and working on the server ok but the SQL string doesn't appear to let me client machines connection to it.

The errors is:-

Connection to SQL Server failed - [DBNETLIB][ConnectionOpen (Connect().[SQL Server does not exist or access denied.

SQL String Used:-

Provider=SQLOLEDB;Server=SERVERNAME\SQLEXPRESS;Database=customer;Trusted_Connection=yes; 

We have tried turning off the firewall with no luck.

any ideas?

thanks again

SQL 2012 Error

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.

Microsoft SQL Server

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

Windows OS

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.