cBots stop trading without being asked!

Hi everyone,

I've just had a successful week of forward testing, every day my cBot has acted as perfectly... However today the robot stopped trading on 2 of the 4 instances I've had running... 

I logged in to my VPS to find that the 2 instances were showing the 'play' button which I had to click to resume trading. The other 2 pairs were trading as expected and were showing the 'stop' button...

I clicked on the play buttons and they fired up fine for a minute or 2 but then stopped of their own accord again... I had to continually restart these 2 instances while the other 2 were trading fine.

My open positions were 20% up and the account is 40% up for the week so there certainly weren't any margin calls or auto protection taking place.

I'm using FxPro through their own VPS supplied by Beeks

Please help me get to the root of this problem so I can resume forward testing on Sunday evening?!?!

Any help would be greatly appreciated...