Visual Studio 2010 Unit test allways gives NullReferenceException error - unit-testing

Question

I am trying make Unit test with Unit test wizard, but I am always getting:
Test method TestProject9.Log_InsertMasterTest threw exception:
System.NullReferenceException: Object reference not set to an instance of an object.
My test.cs:
[TestMethod()]
[DeploymentItem("Engine.dll")]
public void Log_InsertMasterTest()
{
SkinnedRepairSearch_Accessor target = new SkinnedRepairSearch_Accessor(); // TODO: Initialize to an appropriate value
int RepairMasterID = 0; // TODO: Initialize to an appropriate value
int RepairMasterIDOld = 0; // TODO: Initialize to an appropriate value
int id = 0; // TODO: Initialize to an appropriate value
string Text = string.Empty; // TODO: Initialize to an appropriate value
target.Log_InsertMaster(RepairMasterID, RepairMasterIDOld, id, Text);
Assert.Inconclusive("A method that does not return a value cannot be verified.");
}
Log_InsertMaster method:
protected void Log_InsertMaster(int RepairMasterID, int RepairMasterIDOld, int id, string Text)
{
SqlConnection myConnection = new SqlConnection(Globals.DatabaseConnectionString);
SqlCommand myCommand = new SqlCommand("dbo.Repair_LogInsertMaster", myConnection);
myCommand.CommandType = CommandType.StoredProcedure;
myCommand.Parameters.Add("#RepairMasterID", SqlDbType.Int).Value = RepairMasterID;
myCommand.Parameters.Add("#RepairMasterIDold", SqlDbType.Int).Value = RepairMasterIDOld;
myCommand.Parameters.Add("#DateTime", SqlDbType.DateTime).Value = System.DateTime.Now;
myCommand.Parameters.Add("#RepairID", SqlDbType.Int).Value = id;
myCommand.Parameters.Add("#UserSignature", SqlDbType.NVarChar, 200).Value = AdminUser.Signature;
myCommand.Parameters.Add("#Text", SqlDbType.NVarChar, 200).Value = Text;
myConnection.Open();
myCommand.ExecuteNonQuery();
myConnection.Close();
}
How to not get this error? And how to use Unint testing wizard?
Exception line:
SkinnedRepairSearch_Accessor target = new SkinnedRepairSearch_Accessor(); // TODO: Initialize to an appropriate value
I tried and other, public method:
[TestMethod()]
public void EmptyTextBoxesTest()
{
SkinnedRepair target = new SkinnedRepair(); // TODO: Initialize to an appropriate value
Control parent = null; // TODO: Initialize to an appropriate value
target.EmptyTextBoxes(parent);
Assert.Inconclusive("A method that does not return a value cannot be verified.");
}
same error