iPod Docks

[AndyC101]

Hi All

I recieved a Pure-Fi Express Plus docking station for christmas, but when used with my iPhone4 the sound cuts out (dock switches to standby) after a couple of mins. i can press play and it will start again, but only for a couple of minutes. i have checked al the stettings on the phone and all seems correct and it plays fine with bluetooth in the car.

The odd thing is that it works fine with my sons old iPod !!!

any suggestions would be greatly recieved.

Thanks

Andy