cudaErrorNoDevice GTS250 gentoo

cat /proc/driver/nvidia/version

NVRM version: NVIDIA UNIX x86 Kernel Module  260.19.26  Sun Nov 28 22:38:24 PST 2010
GCC version:  gcc version 4.4.5 (Gentoo 4.4.5 p1.2, pie-0.4.5) 

lspci -v

...
02:00.0 VGA compatible controller: nVidia Corporation G92 [GeForce GTS 250] (rev a2) (prog-if 00 [VGA controller])
    Flags: bus master, fast devsel, latency 0, IRQ 19
    Memory at fb000000 (32-bit, non-prefetchable) [size=16M]
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    Memory at f8000000 (64-bit, non-prefetchable) [size=32M]
    I/O ports at ec00 [size=128]
    [virtual] Expansion ROM at fafe0000 [disabled] [size=128K]
    Capabilities: [60] Power Management version 3
    Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
    Capabilities: [78] Express Endpoint, MSI 00
    Capabilities: [100] Virtual Channel <?>
    Capabilities: [128] Power Budgeting <?>
    Capabilities: [600] Vendor Specific Information <?>
    Kernel driver in use: nvidia
    Kernel modules: nvidia
 ...

nvcc -V

nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2010 NVIDIA Corporation
Built on Wed_Nov__3_16:14:08_PDT_2010
Cuda compilation tools, release 3.2, V0.2.1221

make[1]: Entering directory `/home/style/NVIDIA_GPU_Computing_SDK/C/src/MersenneTwister'
nvcc fatal   : Unsupported gpu architecture 'compute_20'