Help Required Locking Faults

[Faycal]

Well hello dear readers,
I have a minor fault with the car as when I manually lock my Renault Clio 02 plate 1.2 only one of the door actually locks while the passanger's won't. i'm not really sure if its due to the battery or any other reasons as if anyone here knows please share your opinion.

 

[Ads29]

The 2 dci's ive had and my 172 are the same, I've always assumed it's just the way they were deaigned. Central locking works on the key fob and also on the button on dash as they should