After applying this kernel my CPU is shown as single core....any help ?

Model Name: Mac
Model Identifier: System Product Name
Processor Name: AMD Athlon(tm) 64 FX-60 Dual Core Processor
Processor Speed: 2.6 GHz
Number Of Processors: 1
Total Number Of Cores: 1
L2 Cache: 1 MB
CPU Features: FPU VME DE PSE TSC MSR PAE MCE CX8 APIC SEP MTRR PGE MCA CMOV PAT PSE36 CLFSH MMX FXSR SSE SSE2 HTT SSE3
Memory: 2 GB
Bus Speed: 200 MHz
Boot ROM Version: Hack.88Z.int.0sh.061193037 (Phoenix Technologies, LTD)
Serial Number: CK157KMHK5B