Create a discussion topic in SharePoint 2010 using Powershell

I have a Discussion list in which i need to add a new topic in SharePoint 2010 using Powershell.

Powershell Script:

$site=Get-SPSite "http://serverName/sites/VJTesting/"
$web=$site.OpenWeb()
$list=$web.Lists.TryGetList("Team Discussion")
if($list -ne $null)
{
$newTopic = [Microsoft.SharePoint.Utilities.SPUtility]::CreateNewDiscussion($list, "Topic6");
# In the "body" column you can add the HTML content so that you can add images and add the styles for the contents.
# To get the HTML content - Go to the "Discussion" list, then click on "Add new Discussion".
# In the body column add the contents and images.
# In the ribbon interface, click on "Editing Tools" and then click on "Format text" tab.
# In the "Markup" group you could see "HTML" option.
# Click on the down arrow and then click on "Edit HTML Source".
# Copy the HTML source.
$newTopic["Body"] = "<div class='ExternalClassF7F26CE68055477797898F1D2250E309'><div class='ExternalClass37FC140BAA764AAD9DAB0F050FD45712' style='color: #ec008c; text-decoration: underline'><p><strong>"My new Topic."<img alt='DISCUSS.GIF' src='/sites/VJTesting/SiteAssets/Lists/Team%20Discussion/EditForm/DISCUSS.GIF' style='margin: 5px'/><br/><br/></strong>?</p></div></div>";
$newTopic.Update();
Write-Host -ForegroundColor Green $newTopic.Title " discussion topic is created successfully"
}
else
{
Write-Host -ForegroundColor Yellow "List does not exists."
}