VVOS WebProxy Configuration

[Marcelo J. Morales]

Hi, I'm looking for a solution related with Server Affinity and Persistent Client State.
I've got two webservers(IIS) behind VirtualVault's WebProxy and I enabled it to manage Cookies (ProxyCookie On) to allow the clients connects the webserver they connect the first time (Server Affinity).
Reading some documentation about cookies, there is a way that if you don't tell the
expiration of the cookie, it longs for the time the browser is open. Apache's webservers
provide the variable "CookieExpires" to do that, but WebProxy's variable is named
"ProxyCookieExpires" and doesn't behave as "CookieExpires". If you don't set this variable, webProxy sets it to 300 seconds (default value).
So I thought, let the IIS webservers set the expiration of the cookie and problem solved!
But after that, when I began the tests, I noticed that WebProxy take the cookie away from the HTTP response, and therefore the cookie doesn't arrive the client browser.
So, the questions are two:
1. Is WebProxy able to set the kind of cookies which long until the browser is closed?
2. Why isn't WebProxy propagating the cookies set by the webservers towards the client?

It's quite clear that either solution is good for me.
Thanks.