C# SQLCommand - Parametrized query is cut short

Apologies for the formatting, it's a little rough

I'm having an issue with an INSERT statement through a SQLCommand in C#. Once the insert is completed the ID is returned to the program.

I have a number of variables populated and a SQLCommand coded up. All the parameters are accounted for.

using (SqlCommand sqlCatCmd = new SqlCommand())
{
   sqlCatCmd.CommandText = 
       "INSERT INTO [ChargeType](IsRecurring, IsApplied4NewMembers, Name, PurseID, AllowFamilyDiscount) " +
       "Values (@IsRec, @NewMem, @CName, @PurseID, @FamDisc);" +
       "SET @ChrgID = SCOPE_IDENTITY();";

  //Connections are opened further up the code no need to include
  sqlCatCmd.Connection = _importSettings.sqlServerConnection;
  sqlCatCmd.Transaction = _importSettings.sqlServerTransaction;

  //Parameters
  sqlCatCmd.Parameters.AddWithValue("@IsRec", _reapply);
  sqlCatCmd.Parameters.AddWithValue("@NewMem", _onNewMem);
  sqlCatCmd.Parameters.AddWithValue("@CName", _name);
  sqlCatCmd.Parameters.AddWithValue("@PurseID", _purse);
  sqlCatCmd.Parameters.AddWithValue("@FamDisc", _applyFamDisc);

  //Create parameter for newly added chargeType id value
  SqlParameter ChrgTypeIDReturn = new SqlParameter();
  ChrgTypeIDReturn.ParameterName = "@ChrgID";
  ChrgTypeIDReturn.Size = 4;
  ChrgTypeIDReturn.Direction = ParameterDirection.Output;
  sqlCatCmd.Parameters.Add(ChrgTypeIDReturn);

  //execute
  sqlCatCmd.ExecuteNonQuery();

 //update variable with returned id value
 _chrgTypeReturnedId = Convert.ToInt32(ChrgTypeIDReturn.Value);
 _importSettings.sqlServerTransaction.Commit();
 conn.CloseSqlConnection(_importSettings.sqlServerConnection);
}

When I execute the query the following is caught:

The parameterized query '(@IsRec nvarchar(1),@NewMem nvarchar(1),@CName nvarchar(25),@Pur' expects the parameter '@PurseID', which was not supplied.

It appear's to be cutting the query short, is there a limit I'm missing here? Looking at my string it appears to be syntactically correct

Thanks