Session Restarting When Using Relative URIs

[Guest]

I am using StateServer and URIs to manage state.

Here is my web.config line
<sessionState mode="StateServer"
stateConnectionString="tcpip=localhost:42424" cookieless="UseUri"
timeout="500"/>

Everything works fine until I try to use a relative path in a link.
ex href="../index.aspx"
This causes the session to restart. Can anyone tell me why this is? It
very irritating.