PPTP Server NAT Issue

Currently I have setup a PPTP Server, its setup on Centos 5x, this Server will be used to provide VPN service to some users, they will connect to the Server and will be able to browse the web in a secure matter. I have setup everything the only thing is that when a user connects to the Server is not able to browse the web, I have spent like 3 Hours trying to find that small issue, and trust me thats a small issue just don't feel like wasting more time on it. So dont try to charge an arm or a leg because you will be just wasting your and my time. The job would be to correct whatever the issue is so that users can browse the web once connected to the VPN, also you will provide in writing with detail what the problem was and how was solved. How much I am thinking on paying for this job ? not more than $20.00 as this is not a big deal. Need this job done right now not tomorrow but today. Please only people who has dione this before and have VPN experience and knows IBSng, if you have experience you know what I am talking about. Thank you guys.