After flat battery, front doors won't open?

[V8Smith]

Guys, my sister has a 51 plate X5 4.4 petrol, the battery was flat so bought a new one. The car started fine but for some reason the front doors won't open, any thoughts on the cause?

[sparkythecat]

We need some more info. If the doors won't open, how did she get in to start it?

[E30M3SE]

The door physically will not open or is it that it will not unlock?

[V8Smith]

It's a bit weird, the rear doors and boot open, the button goes up and down when opening/closing doors but just won't open, I suspect the mechanism has frozen

[E30M3SE]

Or bowden cable issues.