Here is the SQL

SELECT tal.TrustAccountValue
FROM TrustAccountLog AS tal
INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID
INNER JOIN Users usr ON usr.UserID = ta.UserID
WHERE usr.UserID = 70402 AND
ta.TrustAccountID = 117249 AND
tal.trustaccountlogid =  
(
 SELECT MAX (tal.trustaccountlogid)
 FROM  TrustAccountLog AS tal
 INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID
 INNER JOIN Users usr ON usr.UserID = ta.UserID
 WHERE usr.UserID = 70402 AND
 ta.TrustAccountID = 117249 AND
 tal.TrustAccountLogDate < '3/1/2010 12:00:00 AM'
)

Basicaly there is a Users table a TrustAccount table and a TrustAccountLog table.
Users: Contains users and their details
TrustAccount: A User can have multiple TrustAccounts.
TrustAccountLog: Contains an audit of all TrustAccount "movements". A
TrustAccount is associated with multiple TrustAccountLog entries. Now this query executes in milliseconds inside SQL Server Management Studio, but for some strange reason it takes forever in my C# app and even timesout (120s) sometimes.

Here is the code in a nutshell. It gets called multiple times in a loop and the statement gets prepared.

cmd.CommandTimeout = Configuration.DBTimeout;
cmd.CommandText = "SELECT tal.TrustAccountValue FROM TrustAccountLog AS tal INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID INNER JOIN Users usr ON usr.UserID = ta.UserID WHERE usr.UserID = @UserID1 AND ta.TrustAccountID = @TrustAccountID1 AND tal.trustaccountlogid =  (SELECT MAX (tal.trustaccountlogid) FROM  TrustAccountLog AS tal INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID INNER JOIN Users usr ON usr.UserID = ta.UserID WHERE usr.UserID = @UserID2 AND ta.TrustAccountID = @TrustAccountID2 AND tal.TrustAccountLogDate < @TrustAccountLogDate2 ))";
cmd.Parameters.Add("@TrustAccountID1", SqlDbType.Int).Value = trustAccountId;
cmd.Parameters.Add("@UserID1", SqlDbType.Int).Value = userId;
cmd.Parameters.Add("@TrustAccountID2", SqlDbType.Int).Value = trustAccountId;
cmd.Parameters.Add("@UserID2", SqlDbType.Int).Value = userId;
cmd.Parameters.Add("@TrustAccountLogDate2", SqlDbType.DateTime).Value =TrustAccountLogDate;

// And then...

reader = cmd.ExecuteReader();
if (reader.Read())
{
   double value = (double)reader.GetValue(0);
   if (System.Double.IsNaN(value))
      return 0;
   else
      return value;
}
else
   return 0;