VPN IPsec connection problem

Hello,

I’m configuring a tunnel between two sites using stonesoft and Mikrotik 5.1.9 version. I could stablish the tunnel succesfully, but during time, the tunnel down. If I open a command console and launch a continous ping, runs successfully, until in a period of time, loses packets.

Another question, is if I can configure 2 or more policies inside the same tunnel. I need to configure 3 different networks access. While I’m accessing to the first network, if I would like to connect the second one, I lose the access to the first network.

I have other vpn connection throught other gateways, with the same configuration, but not mikrotiks, and don’t have any problem.

What’s the way to configure this in mikrotiks?

Thanks for your help,

Best Regards,