hi im mike
i have been using tight VNC for some time and i have an issue now. Me and a friend have a few classes together at KSU and we use the VNC on his Mac book pro with snow leopard and i use tight VNC and have a Toshiba satellite with windows7. also we both use pavlovmedia for our wireless he just lives down one floor. but today when he needed me to walk him through a power point i couldn't access his mac from my pc i was just wondering what could be the problem? we've done this many time before but today it wont let me view the mac. any help would be amazing

Hi,
What error do you get...?

If you expect to see and operate the Mac from the PC, then that is difficult.

The inverse (see and operate PC from a Mac) has some tools like
http://www.microsoft.com/mac/remote-desktop-client

The Mac stuff

However, IMO, as you only need to see a common presentation

create a web server
add the *.PPT or *.PPS files
allow port 80 in both firewalls
in both routers, add a port forward to your PC (his Mac)
and use IP addresses in your browser instead of domain.names.com/

If you're in a dorm, you likely do not have access to the routers and this falls flat, sorry.

You could EMAIL the *.PPS and step thru it page at a time and discuss ...

Acording to the documentation, tight VNC uses ports 5800+5900 with TCP,
so

• the firewalls on both ends need to ALLOW these ports
• and the routers need to port forward to the LAN address for the specific systems

and port forwarding needs to target a system with a static or dhcp reserved ip-address.