Battery icon has black X tried everything

Hi,

I am currently using a early 2008 macbook running on OS X 10.6.8. I did buy it second hand and I knew there was a battery problem but i've decided to fix it but I am having trouble. The battery icon has the X symbol on it. I have bought a new battery and it's still got the X. I've tried the SMC and PRAM reboots and nothing has happened. I downloaded the 'Coconut Battery' app and it just says N/A on everything. The laptop runs with just the power cord plugged in but i'm sick of using it this way. The new battery when pressing the little button on it all the lights come up green, whilst the old battery nothing happens.

This is what it says on system profiler.

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): 10

Disk Sleep Timer (Minutes): 10

Display Sleep Timer (Minutes): 10

Automatic Restart On Power Loss: No

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): 60

Revision: 0x0000

Family: 0x00ba

Serial Number: 0x0056c554

Charging: No