l2tp and Ipsec VPN Help

Hi,

I followed the l2tp/ipsec vpn setup guide on the mikrotik wiki with examples but I am not able to connect via a Windows 7 client. The connection on the laptop will just time out. When I check the log of the RB750 here is the error message: “phase1 negotiation failed due to time up 96.37.102.127[500]<=>70.197.197.202[1173] 458d081d4ebda439:3def15db2f5233fe”. Any suggestions would be much appreciated. I have also created UDP firewall accepts on the input chain for the following ports: 50,1701,500,4500. Thanks in advance!