I get this error when run the basket pipeline in this code:

public object Put(BasketUpdate request)
{
   var basket = SiteContext.Current.OrderContext.GetBasket(true);

  foreach (AddRemoveProduct productUpdate in request.Products.EmptyIfNull())
    {
     if (productUpdate.OrderLineId != null)
            TransactionLibrary.UpdateLineItem(productUpdate.OrderLineId.Value, productUpdate.Quantity);
       else if (productUpdate.Quantity > 0)
           TransactionLibrary.AddToBasket(productUpdate.Quantity, productUpdate.ProductSku, productUpdate.ProductVariantSku, false);
 }

   TransactionLibrary.ExecuteBasketPipeline();

 var basketViewModel = new BasketViewModel(basket);
    return new BasketResponse(basketViewModel);
}

Error:

Exception occoured 
while processing pipeline 'UCommerce.Pipelines.Basket.BasketPipeline'. See inner 
exception for details.

stackTrace:
[BasketUpdate: 27-06-2014 
10:52:35]:\n[REQUEST: {}]\nUCommerce.Pipelines.PipelineException: Exception 
occoured while processing pipeline 'UCommerce.Pipelines.Basket.BasketPipeline'. 
See inner exception for details. ---> 
NHibernate.Hql.Ast.ANTLR.QuerySyntaxException: Exception of type 
'Antlr.Runtime.NoViableAltException' was thrown.\r\n at 
NHibernate.Hql.Ast.ANTLR.ErrorCounter.ThrowQueryException()\r\n at 
NHibernate.Hql.Ast.ANTLR.HqlParseEngine.Parse()\r\n at 
NHibernate.Hql.Ast.ANTLR.ASTQueryTranslatorFactory.CreateQueryTranslators(String 
queryString, String collectionRole, Boolean shallow, IDictionary`2 filters, 
ISessionFactoryImplementor factory)\r\n at 
NHibernate.Engine.Query.HQLStringQueryPlan.CreateTranslators(String hql, String 
collectionRole, Boolean shallow, IDictionary`2 enabledFilters, 
ISessionFactoryImplementor factory)\r\n at 
NHibernate.Engine.Query.HQLStringQueryPlan..ctor(String hql, String 
collectionRole, Boolean shallow, IDictionary`2 enabledFilters, 
ISessionFactoryImplementor factory)\r\n at 
NHibernate.Engine.Query.HQLStringQueryPlan..ctor(String hql, Boolean shallow, 
IDictionary`2 enabledFilters, ISessionFactoryImplementor factory)\r\n at 
NHibernate.Engine.Query.QueryPlanCache.GetHQLQueryPlan(String queryString, 
Boolean shallow, IDictionary`2 enabledFilters)\r\n at 
NHibernate.Impl.AbstractSessionImpl.GetHQLQueryPlan(String query, Boolean 
shallow)\r\n at NHibernate.Impl.AbstractSessionImpl.CreateQuery(String 
queryString)\r\n at 
UCommerce.EntitiesV2.Queries.Orders.ProductsOnOrderQuery.Execute(ISession 
session)\r\n at 
UCommerce.Pipelines.Basket.CalculateOrderLineTaxTask.Execute(PurchaseOrder 
order)\r\n at UCommerce.Pipelines.Pipeline`1.Execute(T subject)\r\n --- End of 
inner exception stack trace ---\r\n at UCommerce.Pipelines.Pipeline`1.Execute(T 
subject)\r\n at 
UCommerce.Transactions.TransactionLibraryInternal.ExecuteOrderPipeline(String 
pipelineName)\r\n at 
Portal.WebApplication.Orders.Services.CheckoutService.Put(BasketUpdate 
request) in 
c:\\Code\\trunk\\src\\Portal.WebApplication\\Orders\\Services\\CheckoutService.cs:line 
72\r\n at ServiceStack.ServiceHost.ServiceRunner`1.Execute(IRequestContext 
requestContext, Object instance, TRequest request)