Auto Login with site viewing password is not working

[rohan]

We are using smugmug gallery for internal use with Site-wide viewing password set. Till now users used to login to smumug seamlessly from internal site which did a html Form post to smugmug and now it has stopped working any ideas why or what change needs to be done?

Form tag has UserID and userViewPassword as inputs

[Andy]

We need to know your site, please.

[rohan]

We need to know your site, please.

http://liquidnet.smugmug.com/

this is code below (i have masked password and userid

<form action="http://liquidnet.smugmug.com/homepage/viewpassword.mg" method="POST" name="formlog" id="formlog" target="_blank">
<input type="hidden" name="UserID" value="&&&&&" />
<input type="hidden" name="userViewPassword" value="******">
<input type="hidden" id="goTo" name="goTo" value="liquidnet.smugmug.com/index.mg?UserID=&&&&&offered=yes&UserID='&&&&&'&value='******'"/>
</form>