Sip Phone crash vista32

Hi all

I’ve recently setup Spark and Openfire together to play about with and to use as an intergrated comms solution, however i’m having a bit of bother with the Phone plugin on one of the clients.

Spark correctly registers with the Asterisk Server and I can place an outbound call, however when I try to terminate the call Spark locks up and the call refuses to hang up.

The only thing I can do is Kill spark from the task manager

Spark version is 2.5.8 phone client is v 1.0

Does anyone have any ideas of where I should be looking to try and solve this

It seems to be specific to this machine as it works fine on a win7 x64 pc I tried it on.