VPN problem

[phoenix-yk]

hi all. I'm living in a country where nearly all sites (even facebook, youtube, twitter, friendfeed ...) have been filtered and we can not access them without vpn.
I use vpn on my pc and there is no problem using it but I can't have it on my ppc.
I setup everything in detail but when I try to connect I get the username/pass error which says:

VPN server problem. Verify your username and password, and try again. If the problem continues, turn the device off and try again

I've asked my vpn provider for mobile compatible IP and he has given me so, which he says works fine for iphone users. but I still have problem connecting to.

here are the info of the vpn I use:

server ip : us.parsns.co.cc
pars.services: VPN Type : L2TP
pars.services: key ya secret : r3102030a10
user: parsservice
pass: test

can anybody help please?