Selenium remote testing via Teamcity.

Can anyone provide steps to getting a basic selenium 2 unit test to run? I have been struggling with this for quite some time. below are the steps I have take to now be at the current position:
local machine: install selenium IDE for firefox. Create very basic test via IDE. file > export as c# Nunit WebDriver
run the test via Nunit and VS2010. both pass fine.
upload to teamcity.
when using xpath = Driver.FindElement(By.XPath("/html/body/div/div/div[2]/ul/li[4]/a")).Click();
fail:failed. OpenQA.Selenium.ElementNotVisibleException : Element is not currently visible and so may not be interacted with

when using Driver.FindElement(By.LinkText("Invoice")).Click();
fail: OpenQA.Selenium.NoSuchElementException : Unable to locate element: {"method":"link text","selector":"Invoice"}

I have tried adding timeout as well like this
public void SetupTest()
        {
baseURL = "http://dev.finance.portal/";
           driver = new FirefoxDriver();
           driver.Manage().Timeouts().ImplicitlyWait(TimeSpan.FromSeconds(30));
            Selenium = new WebDriverBackedSelenium(driver, baseURL);
           Selenium.Start();
        verificationErrors = new StringBuilder();

        }


can someone please help me out with steps to getting a webdriver version of selenium to pass via teamcity?

here is a basic test structure
using NUnit.Framework;
using OpenQA.Selenium;
using OpenQA.Selenium.Firefox;
using Selenium;


namespace WorkBench
{

    [TestFixture]
    class Program
    {
        public IWebDriver Driver;
        public ISelenium Selenium;
 private string baseURL = "http://dev.finance.portal/";
        [SetUp]
        public void Setup()
        {
     Driver = new FirefoxDriver();
            Selenium = new WebDriverBackedSelenium(Driver, baseURL);
            Selenium.Start();
        }

        [TearDown]
        public void TearDown()
        {

        }

        [Test]
        public void TestMouseOver()
        {
            Driver.Navigate().GoToUrl(baseURL);
 Driver.FindElement(By.LinkText("Invoice")).Click();
 //Selenium.ClickAt("link=Invoice","10,10");
            //Selenium.MouseOver("link=Invoice");
        }
}