Thanks guys

In that case I think its the charging is the problem. The battries I have have been modded from another model. I had to take a one or two batteries off the pack and then re-connect the leads to fit inside the model. When I start out it doesnt happen as frequently so I think a nice long charge is what is needed as I as I think the most amount of charge was about 6 hours, the RX and servos are brand new and the TX I have had for a while but it hasnt much use so it might just be a case of a long charge and see how it goes.

As for the tester I was thinking about getting one of those recently, might be my next purchase.

Rich.