Problem to connect to VPN server behind Netgear DG834G router.

Hallo,

Actually my problem was good described in the

http://www.experts-exchange.com/Networking/Broadband/VPN/Q_20922615.html

thread. Unfortunately the solution at the end (to upgrade/downgrade to 1.04 firmware) did not worked for me. I trye to put my question on the end of this thread, but since no one replyed, here I go with a new thread:

I have a small LAN of 5 computers (4 of them running Windows XP Home edition SP2, the last one is an Linux machine). I bought the DG834G ADSL modem + router from netgear to connect them all. So far all worked as should. The problem started when I tried to set up an VPN server onto one of the Win XP copmputers to be able to tunel the network from outside using my notebook when I am out of home. The neotebook has an GPRS internet connection. So I set up an account on dyndns.org to be able always find my canging routers address (ISP use dynamic addressing). Then I set up an PPTP account on one of the LANs computers. I use routers DHCP server ability, but I reserved the address of the VPN server computer, so it does not change within the LAN. on the router I set up the inbound connections firewall to pass throug the PORTs 1723 and 500 to VPN servers address.

Now when I am trying to connect with the notebook to the VPN server I always become the 721 ERROR. It says the time run out  by verifiing the username and password. In the log of the router it says the connection was passed through to the IP address of the VPN server with the comment "MATCH".

In some of the advices I ŕead about to try windows tools pptpclnt.exe and pptpsrv.exe. I am able to run the pptpsrv.exe, which waits for the connection, but on all three computers the program pptpclnt.exe just blinks and closes itself without prompting me to anything. This could be sign to a problem couldnt it?

Please advice what to do to be able to connect to the VPN server. I spend abou three days now experimenting and I would be very happy to find some working solution. By the way the routers manufactor declares the router to be able to passthrough VPN connections. There has obviously been some problems with firmware since by the Firmware 1.04.01 it states VPN passthrough solved, but for me it does not work with 1.04.01 nor 1.05.00 :-(

I am giving all my points to this hoping I will find the right EXPERT. The online help by Netgear did not bother to answer me and their telephone support does not pick up the phone in Austria either.... :-(