WatiN.Core.IE component giving Timeout while Internet Explorer busy error while opening a URL

I am using WATin IE component for browsing a specific website On StartBrowsing button click event I am initializing the object of WatiN.Core.IE and passing the website URL for opening the website as shown in the code snippet below :-

WatiN.Core.IE ie;  

private void btnStartBrowsing_Click(object sender, EventArgs e)
{          
  ie = new IE(URLs.mainURL);
}

Sometimes or rather i should say 5/10 times I am getting this error :- "Timeout while Internet Explorer busy"

How to get around this problem??