L2TP advice required - cannot build tunnel -

Hi, I have had very little experience with RouterOS to date, but would appreciate some guidance/help.

I am trying to configure an L2TP tunnel between an L2TP client (in this case an IP) and a Mikrotik 750GL.

I have created the interface and I believe the necessary peer information etc… but the tunnel just doesn’t want to seem to build. I am using Winbox to configure…

Strangely, I do see the tunnel as “active” but only for a little time - and then I get a countdown timer.. this seems to increase on every occasion by a few minutes…

I must admit, I don’t know if this is normal or not.

I have attached a log from the MT device - in the hope that someone may be able to tell me where I am going wrong..

Thanks in advance for any help!
mtik.jpg