hello..
this is the default behaviour of VPN client.. this is to enhance the security of blocking internet when on the Private network. you can anyway configure split tunneling to overrule this... on the vpn group configure the following:
vpngroup abcvpn split-tunneling 100
access-list 100 permit ip host 192.168.100.1 (server) 10.1.1.0 255.255.255.0 (Ip pool)
this will allow only traffic from the ip pool to the server 192.168.100.1 through the ipsec tunnel. all other traffic is put on the lan card and you can access internet on this case..
hope this helps.. all the best..rate replies if found useful..
Raj