We have an array of two "Integrated mode" ISA Server Enterprise Edition. We applied the wizard "Configure a Client VPN" on two servers and VPN Clients are succesfully connected to our VPN server using PPTP. Now, I want to add WLBS on internal intrerfase to balance Firewall and NAT Client Request. After we do the NLB configuration over internal interfases of both boxes, I test the NLB and it seems to be working fine, but VPN users are not able to "see" the internal network anymore, the vpn client connected can not ping any internal address and receive a "timeout" response. Any idea of what's happening?