Help w macbook 10.6.8 bought new battery A1185 not working

Question

I need help! I bought my macbook in early 2009 and my battery stopped working about 2 years ago and in the meantime I updated the system to Snow Leopard so now it is Mac OS X version 10.6.8. I bought online a genuine apple battery model A1185 (i pulled out the original battery and that was the model number) . Now i have put in the new battery but my computer doesnt recognise that its there and has a X in the battery symbol on the top of the screen. The power cord is a green colour except for when i turn it off and then it turns orange. So I left the battery in and the cord connected overnight while it was turned off with the orange light on thinking that the new battery must be charging but today when i checked it (over 12 hours later) the battery symbol still shows an X and when i disconnect the power cord the computer loses all power indicating that it is not registered that there is a battery there.
Also when I remove the new battery and press the small button only one of the five green lights, light up. I also have been browsing this issue online and saw some reference to the old macbook battery not working with the new system 10.6 so i did a software update but still not working. Any help greatly appreciated!
Hardware Overview:
  Model Name:          MacBook
  Model Identifier:          MacBook4,1
  Processor Name:          Intel Core 2 Duo
  Processor Speed:          2.1 GHz
  Number Of Processors:          1
  Total Number Of Cores:          2
  L2 Cache:          3 MB
  Memory:          1 GB
  Bus Speed:          800 MHz

Answer 1

Thanks nbar for your reply but unfortunately its still not working after doing the SMC reset and following the other suggestions. Also below is the battery info from the Finder Menu Bar, hold down Option and click the Apple Logo > System Profiler > Hardware > Power
Battery Information:
  Charge Information:
  Charge remaining (mAh):          0
  Fully charged:          No
  Charging:          No
  Full charge capacity (mAh):          0
  Health Information:
  Cycle count:          0
  Battery Installed:          No
  Amperage (mA):          0
  Voltage (mV):          0
System Power Settings:
  AC Power:
  System Sleep Timer (Minutes):          77
  Disk Sleep Timer (Minutes):          10
  Display Sleep Timer (Minutes):          20
  Automatic Restart On Power Loss:          Yes
  Wake On AC Change:          No
  Wake On Clamshell Open:          Yes
  Wake On LAN:          No
  Current Power Source:          Yes
  Display Sleep Uses Dim:          Yes
  Battery Power:
  System Sleep Timer (Minutes):          10
  Disk Sleep Timer (Minutes):          10
  Display Sleep Timer (Minutes):          2
  Wake On AC Change:          No
  Wake On Clamshell Open:          Yes
  Display Sleep Uses Dim:          Yes
  Reduce Brightness:          Yes
Hardware Configuration:
  UPS Installed:          No
AC Charger Information:
  Connected:          Yes
  ID:          0x0100
  Wattage (W):          85
  Revision:          0x0000
  Family:          0x00ba
  Serial Number:          0x00a0caf9
  Charging:          No
Power Events:
Next Scheduled Events:
  Type:          Wake or Power On
  Scheduled By:          Repeating Event
  Time:          30/08/13 12:00 AM
Repeating Events:
  Type:          Wake or Power On
  Time:          12:00 AM every day