Graphics card - internet not working. help!

My pc is an:

emachines 410
2.4Ghz intel celeron processor
56k fax modem v.92 ready PCI
Radeon 9200 graphics card
512mb DDR
10/100mbps ethernet for connectivity to broadband cable/dsl

I recently had my computer fixed, and the wrong graphics card was put in (one that was broken a nvida 7200) and the internet worked fine. I put my old graphics card (the radeon 9200 graphics card) back in, and it doesnt like the internet.

Just wont connect.

Does it make a difference that the Nvida 7200 graphics card thats in there at the moment that is broken has a connextent (or whatever it is) bit on it, but with the radeon 9200 card there isnt one built into it, its seperate?

someone please help!
This is really starting to confuse me as to why the broken one works with the internet but the working graphics card doesnt!

 

heres a few more details about my pc:


Computer:
Operating System Microsoft Windows XP Home Edition
OS Service Pack Service Pack 1
DirectX 4.09.00.0904 (DirectX 9.0c)
Computer Name KEYCOM (Kiri's Computer)
User Name Kiri Robertson

Motherboard:
CPU Type Intel Celeron, 2400 MHz (24 x 100)
Motherboard Name AOpen MX4LR (3 PCI, 1 ADD, 1 CNR, 2 DIMM, Audio, Video, LAN)
Motherboard Chipset Intel Brookdale-G i845GL
System Memory 503 MB (PC2100 DDR SDRAM)
BIOS Type Award (05/15/02)
Communication Port Communications Port (COM1)
Communication Port Printer Port (LPT1)

Display:
Video Adapter Intel Extreme Graphics
3D Accelerator Intel Extreme Graphics

Multimedia:
Audio Adapter Intel 82801DB ICH4 - AC'97 Audio Controller [A-1]

Storage:
IDE Controller Intel(R) 82801DB Ultra ATA Storage Controller - 24CB
Floppy Drive Floppy disk drive
Disk Drive ST380012A (80 GB, 7200 RPM, Ultra-ATA/100)
Optical Drive HL-DT-ST DVDRAM GSA-4167B (DVD+R9:8x, DVD-R9:4x, DVD+RW:16x/8x, DVD-RW:16x/6x, DVD-RAM:5x, DVD-ROM:16x, CD:48x/32x/48x DVD+RW/DVD-RW/DVD-RAM)
Optical Drive SAMSUNG CD-R/RW SW-248F (48x/24x/48x CD-RW)
SMART Hard Disks Status OK

Partitions:
C: (NTFS) 76316 MB (69410 MB free)

Input:
Keyboard Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
Mouse PS/2 Compatible Mouse

Network:
Network Adapter Realtek RTL8139 Family PCI Fast Ethernet NIC (212.9.119.133)
Modem Conexant SoftK56 Modem(M) #2

Peripherals:
USB1 Controller Intel 82801DB ICH4 - USB Controller [A-1]
USB2 Controller Intel 82801DB ICH4 - Enhanced USB2 Controller [A-1]

[ Integrated: Intel 82845G/GL/GV Graphics Controller ]

Graphics Processor Properties:
Video Adapter Intel 82845G/GL/GV Graphics Controller
GPU Code Name Brookdale-G
PCI Device 8086 / 2562
Bus Type Integrated
GPU Clock 200 MHz
RAMDAC Clock 350 MHz
Pixel Pipelines 1
TMU Per Pipeline 2
Vertex Shaders Not Supported
Pixel Shaders Not Supported
DirectX Hardware Support DirectX v6.0
Pixel Fillrate 200 MPixel/s
Texel Fillrate 400 MTexel/s