The cisco7507/8-mx is a vpn server.When the vpn client sessions are only limited up to 2048 sessions,but the configration of session limited is more than that.The vpn client all use pptp and not the ipsec.IOS is rsp-ik9sv-mz.123-8.T11.bin.I want to kown how can i add the session numbers if it has not a hardware or software promblem.