CR login failure on Production System

Hi.

I'm facing a strange behavior.

My Dev system is a x64 Win 7, with VS 2010, CR for VS 13.0.4.750 and runtime x64 13.0.4.750.

I setup  some old RPTs to my production DB that is a MSSQL 2008 R2 on a Win 2008 R2 x64.

All works pretty fine when running locally.

After deploy my web application to Production, all reports throws the same error:

Falha ao abrir a conexão.

Detalhes:  [Código do Fornecedor de Banco de Dados: 18456 ]Falha ao abrir a conexão.

Detalhes:  [Código do Fornecedor de Banco de Dados: 4060 ]Falha ao abrir a conexão.

Report {2014DF7F-C0F7-4FB1-8B55-05FC4E21FB4F}.rpt

Detalhes:  [Código do Fornecedor de Banco de Dados: 18456 ]

Also, I tested the same scenario in another server that is a win 2003 r2 x86 running a MSSQL 2008 R2 and everything works.

The connection is setting up by c# code both to main RPT and SubReport.

Despite of that, I manually setup the connection by hand to de production server.

Help!

Thanks for all in advance.