asp.net mvc override method problem

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MVC3

hi frnds i am beginnner in MVC 3.0. my problem is that i want to bind ActionLink based on my condtion.

this is view detail -------------------------------

@model IEnumerable<mvcapplication2.models.product>

@{
ViewBag.hhrhr = "Index";
}

Index

@Html.ActionLink("Create New", "Create")

@foreach (var item in Model) {
}

ProductName	Supplier	Category	QuantityPerUnit	UnitPrice	UnitsInStock	UnitsOnOrder	ReorderLevel	Discontinued
@Html.DisplayFor(modelItem => item.ProductName)	@Html.DisplayFor(modelItem => item.Supplier.CompanyName)	@Html.DisplayFor(modelItem => item.Category.CategoryName)	@Html.DisplayFor(modelItem => item.QuantityPerUnit)	@Html.DisplayFor(modelItem => item.UnitPrice)	@Html.DisplayFor(modelItem => item.UnitsInStock)	@Html.DisplayFor(modelItem => item.UnitsOnOrder)	@Html.DisplayFor(modelItem => item.ReorderLevel)	@Html.DisplayFor(modelItem => item.Discontinued)	@Html.ActionLink("Edit", "Edit", new { id=item.ProductID }) | @if (@item.ProductName == "Chai well") { @Html.ActionLink("Details", "Details", new { id = item.ProductID}) } else { @Html.ActionLink("Details", "Details", new { id = item.ProductID,catid= item.CategoryID }) } | @Html.ActionLink("Delete", "Delete", new { id = item.ProductID }) }

---------------------------------------------
in controller class


public ViewResult Details(int id,int catid)
{
Product product = db.Products.Single(p => p.ProductID == id && p.CategoryID== catid);
return View(product);
}
// GET: /Product/Details/5
public ViewResult Details(int id)
{
Product product = db.Products.Single(p => p.ProductID == id);
return View(product);
}


i override the Details method ... then i m gettting this error


The current request for action 'Details' on controller type 'ProductController' is ambiguous between the following action methods:
System.Web.Mvc.ViewResult Details(Int32, Int32) on type MvcApplication2.Controllers.ProductController
System.Web.Mvc.ViewResult Details(Int32) on type MvcApplication2.Controllers.ProductController


pls help me..........