Hi Michael,
OS's are Windows 2008r2 on the server side, and a mix of windows 7 and windows 8 clients.
Firewalls are disabled on both ends (for the time being - I'm going to set them up once I have it working without)
Server Config
port 8081
proto tcp
dev tun
ca "C:\\Program Files\\OpenVPN\\config\\ca.crt"
cert "C:\\Program Files\\OpenVPN\\config\\DCS.crt"
key "C:\\Program Files\\OpenVPN\\config\\DCS.key"
dh "C:\\Program Files\\OpenVPN\\config\\dh1024.pem"
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
client-to-client
keepalive 10 120
comp-lzo
persist-key
persist-tun
status openvpn-status.log
verb 3
Client Config
client
dev tun
proto tcp
remote mydomain.co.uk 8081
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert DesktopDCS.crt
key DesktopDCS.key
ns-cert-type server
comp-lzo
verb 3