Windows 7: Route single IP over different interface (wlan)

Well I am doing exactly the same and Windows 8 insists in using the "LAN" gateway... instead of the "WLAN" gateway.

So, not sure is Windows is "capricious" :) or not; but I guess this command should be straight forward to use.

Tried several combinations, like not using the specific IF for WLAN or setting a lower METRIC or using a MASK for ...108.142.0. Always the same result; it apparently gets ignored.

route ADD 93.108.142.151 10.30.94.1 IF 13 (where 10.30.94.1 if the WLAN gateway)

After the command is given a route print and a tracert returns

Active Routes:
Network Destination     Netmask          Gateway       Interface       Metric
0.0.0.0                 0.0.0.0          10.30.60.1    10.30.61.140    20
0.0.0.0                 0.0.0.0          10.30.94.1    10.30.94.25     25
93.108.142.151          255.255.255.255  10.30.94.1    10.30.94.25     21

C:\Windows\system32>tracert 93.108.142.154

   1     2 ms    1 ms     1 ms  10.30.60.1
   2     1 ms    1 ms     1 ms  192.168.191.55
   3    10 ms    8 ms     8 ms  192.168.79.97