Shaping per pptp ip

[lowcypl]

I have authorised user by PPTP witch static ip 192.168.50.107, So i create new rule based on, qVOIPUp(/qVOIPDown DiffServ/Lowdelay/Upload for cute global upload transfer by 192.168.50.107. In  qVOIPUp queues i change default limit 64 to max 64 and it not working bandwidth from 192.168.50.107 still passing by default qwandef . Whats wrong ?

I tried changes LAN->WAN * 192.168.50.107 to PPTP->WAN * 192.168.50.107

but its not working too what do u suggest for cute transfer per vpn ip ?