c# How to handle multiple MSSQL attach

two part question

I have a WCF webservice which attaches MSQL DB files (templates) to the server.

first question:
Does anybody know why this could be very slow on the server? when I run the service on my client machine  the attach is like 10 times faster.

second question:
I have problems with the timeout as when my service tries to handle multiple requests I get a timeout because apparently the sql server is busy with handling my previous request. What is the correct way to handle this?


 

//Creating connection
                    SqlConnection conn = new SqlConnection("Data Source=" + Properties.Settings.Default.MSSQLServerName + ";Integrated Security=SSPI");
                    SqlCommand cmd = new SqlCommand("", conn);

                    //Creating SQL command
                    cmd.CommandText = "exec sys.sp_attach_db " + name + " , '" + MDFpath + "','" + LDFpath + "'";


                    
                    //Open connection
                    conn.Open();

                    //Execute query
                    cmd.ExecuteNonQuery();

                    //Dispose of connection
                    cmd.Dispose();
                    conn.Dispose();

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