Apache as reverse proxy for traveler

hi everybody. I have a problem with the configuration of apache as reverse proxy for IBM Traveler. This is a part of my apache config

<Location /Microsoft-Server-ActiveSync>
ProxyPass https://backend_server/traveler/Microsoft-Server-ActiveSync https://ukm-slns55.int.mechel.corp/traveler/Microsoft-Server-ActiveSync
ProxyPassReverse https:/backend_server/traveler/Microsoft-Server-ActiveSync https://ukm-slns55.int.mechel.corp/traveler/Microsoft-Server-ActiveSync
SSLRequireSSL

<Location /travelerclients>
ProxyPass https:// https://ukm-slns55.int.mechel.corp/travelerclientsbackend_server https://ukm-slns55.int.mechel.corp/traveler/Microsoft-Server-ActiveSync/travelerclients https://ukm-slns55.int.mechel.corp/travelerclients
ProxyPassReverse https:// https://ukm-slns55.int.mechel.corp/travelerclientsbackend_server https://ukm-slns55.int.mechel.corp/traveler/Microsoft-Server-ActiveSync/travelerclients https://ukm-slns55.int.mechel.corp/travelerclients
SSLRequireSSL

<Location /traveler>
ProxyPass https:// https://ukm-slns55.int.mechel.corp/travelerbackend_server https://ukm-slns55.int.mechel.corp/traveler/Microsoft-Server-ActiveSync/traveler https://ukm-slns55.int.mechel.corp/traveler
ProxyPassReverse https:// https://ukm-slns55.int.mechel.corp/travelerbackend_server https://ukm-slns55.int.mechel.corp/traveler/Microsoft-Server-ActiveSync/traveler https://ukm-slns55.int.mechel.corp/traveler
SSLRequireSSL

Http-task on the backend traveler server creates a new session for every request (post, get, options) from the apache. For example, if user have 50 new messages in his mailfile, traveler client creates 50 GET requests and domino http-task creates new session for each such request . As I understand, server should use an opened earlier session for requests processing till timeout of session cookie. I am a new in the web administration so I’ll be grateful for your help.