Configure dell 531S for dual processor

I need help figuring how to get my Dell 531s to recognize my dual processor
Manufacturer Dell Inc.
Model 0RY206
Version 00
Chipset Vendor NVIDIA
Chipset Model MCP61
Chipset Revision A3
Southbridge Vendor NVIDIA
Southbridge Model MCP61
Southbridge Revision A2
Brand Dell Inc.
Version 1.0.13
Date 02/09/2009

AMD Athlon 64 X2 5000+ Black Edition
Cores 1
Threads 1
Name AMD Athlon 64 X2 5000+ Black Edition
Code Name Brisbane
Package Socket AM2 (940)
Technology 65nm
Specification AMD Athlon(tm) 64 X2 Dual Core Processor 5000+
Family F
Extended Family F
Model B
Extended Model 6B
Stepping 2
Revision BH-G2
Instructions MMX (+), 3DNow! (+), SSE, SSE2, SSE3, x86-64
Bus Speed 200.9 MHz
Rated Bus Speed 1004.5 MHz
Stock Core Speed 5000 MHz
Stock Bus Speed 200 MHz
Average Temperature 80 °F
L1 Data Cache Size 64 KBytes
L1 Instructions Cache Size 64 KBytes
L2 Unified Cache Size 512 KBytes
Core 0
Core Speed 2612.0 MHz
Multiplier x 13.0
Bus Speed 200.9 MHz
Rated Bus Speed 1004.5 MHz
Temperature 80 °F
Thread 1

info taken from Speccy

PLEASE PLEASE PLEASE help me. What am I missing?
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More about configure dell 531s dual processor
  1. Did you enable multi-core processing from the BIOS?
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