Forward Specific Traffic over VPN not working

[9pi]

Hi everyone. I read lots of FAQ, hints, instructions and used the search in the forum.
But unfortunately, I did not succeed.

I want to use my VPN Gateway for special traffic (for this post assume 23.239.0.0/16 - it´s http://www.iplocation.net/ to check, if it´s working).

For this I have assigned the following ALIASES:

• VPN_Hosts  (192.168.1.100, 192.168.2.101)
• VPN_Targets (23.239.0.0/16)

On my interface CISCO_WAP (00:0d:b9:34:da:9e) I have defined the following RULES:

Proto 		Source 		Port 	Destination 	Port 	Gateway
IPv4 TCP 	192.168.2.0/24 	* 	VPN_Targets	* 	VPN_GATEWAY_VPNV4 
IPv4 * 		* 		* 	* 		* 	WAN_DHCP 
IPv4 * 		CISCO_WAP net 	* 	* 		* 	* 
IPv6 * 		* 		* 	* 		* 	* 

I have no idea why, but the first rule is not applied. What do I have to change?
I assume, that the concept is not working in general, because if I try to use the VPN_GATEWAY for every (*) destination, I do not get an internet connection any longer.  :'(

Please help me out to configure it appropriately!
Thanks a lot for your expertise.

If you need any further information, please let me know and I will share it with you!