.NET 4.0 Border around Image Links

I am using the following code for a graphical site:
<asp:HyperLink ID="lnkLogin" runat="server" BorderWidth="0px" BorderStyle="None" NavigateUrl="javascript:uimLogin.Show()" ImageUrl="~/Images/ico-login.gif"></asp:HyperLink>
In .NET 3.5 and Visual Studio 2008 this process worked fine.  I am trying to use Visual Studio 2010 .NET 4.0 to convert the site, and now my formatting is incorrect.  All hyperlink images show up with a 2px border around them.  I have tried CCS and Border attributes to try and remove the border and nothing seems to work.

I have not found anyone else having this problem, so I am wondering does anyone have a solution, or another method for doing this without loosing my formating?


Thanks
-Brandon



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