Megistal, you are right. I didn't see the post where he said tht he can connect using the IP address.

This is because SQL Server Express Edition by default uses dynamic ports for connecting to a TCP endpoint. You should go to SQL Server Configuration Manager -> Network Configuration ->...

You didn't provide the actual statment/statements that are executing ("some complex stuff reading and filtering from existing permanent tables"), so I'll will give my best to help you without knowing...

If you are interested in certification retirement, you can find all the information you need at http://www.microsoft.com/learning/mcpexams/status/examstoretire.mspx. It says there: "New-generation certifications, including Microsoft Certified Technology Specialist (MCTS),...