Troubles with the routing via SSTP

Hey everyone,
I just set-up an sstp tunnel (LAN 2 LAN) according to the manual. Now - I observe a very weird behavior. Everything was running fine for about 24 hours, and for no apparent reason all of a sudden today I don’t have access between the remote user networks. From the routers I ping every network and IP on the remote side (from both routers). From the local user networks I can ping the local SSTP interface but not the remote and neither of the networks there. Once again - there were no changes made, it was running fine for almost 24 hours. The only thing I changed was that I made the leased IPs static (a best practice for setting up Domain controller and DNS). I now removed the static bindings, but the traffic still doesn’t go. Can someone help?