iPhone 3G S not charging

Hello,

I replaced 6 hours ago following the instructions posted here (with a battery purchased from iFixit) an everything seemed ok.

When I powered up my iPhone 3G S the phone booted showing an 80% charge on the battery.

Left it charging the whole night but the battery is not charging.

When I connect it to my MacBook it shows that is connected to the power (on the battery icon of the iPhone itself).

iTunes recognizes it (just got it backed up) but the battery icon in iTunes shows that the phone is not charging (no power cord or flash icon on it)

I opened it again and checked connectors 1,2,3,4,5 took pictures on them, zoomed to see if something was damaged during the process .... everything is ok.

Could you please help me on this issue.

Thanks and regards,