New Post: AuthorizeNET Redirect Problem

<root>
<GatewayURL> https://test.authorize.net/gateway/transact.dll</GatewayURL>
<ButtonImageURL>Image Path</ButtonImageURL>
<TransactionKey>Romoved</TransactionKey>
<LoginId>Removed</LoginId>
<ReturnURL>path of the checkout Module Page</ReturnURL>
</root>

I followed all the settings::

But after transaction when it return to the page

its URL is :
https://test.authorize.net/gateway/transact.dll.

and the css are not working for this page.

how can I solve this problem?