Edge Client not working with Mac Yosemite

We have recently had three users report that they cannot sustain a session from their MacBook Pros to our VPN using the edge client. The session logs show that the f5 authenticates and grants access to the user, a PPP tunnel is established and 6 seconds later the tunnel closes.

We have a work around of connecting to the VPN using Safari but would prefer to use the dedicated client.

Has anyone else seen this and found a solution?

Jim McMurchie