T61 no Gigabit network connection in Win7

[ac12]

I have a T61 which had been on a 10/100 switch until now.
I just put it on a Gigabit switch, but the lights on the switch and the access connection on the T61 say 100 Mbps, not 1000 Mbps.
The cable between the T61 and the Gigabit switch is a new cat6 cable.
Any ideas on why the connection is not up at 1000, and what I can do to get it to connect at 1000 Mbps?

thanks

[dr_st]

Check the link speed settings in the network controller properties in the device manager.

Try reinstalling the driver.

[ac12]

Check the link speed settings in the network controller properties in the device manager.

Try reinstalling the driver.

Link speed was at "auto."
I set it to "GB" to force it, but then when I tried to reset the connection with ipconfig /release then ipconfig /renew the computer claimed that there was no connection. The only way to get the network connection back was to put the link speed back to "auto."

I looked for Lenovo and Intel drivers but neither has Win7 drivers.
Lenovo had Vista drivers, and Intel had Server2008 drivers.

Dang, do I have to replace the LAN card? But the HMM does not show the LAN nic as being field replaceable, just the WiFi card.

Update:
I tried to install the Lenovo driver, did not install.
I installed the Intel driver (from Intel), same as before, auto at 100Mbps, and disconnects when forced to Gigabit.
FOOEY

[dr_st]

The LAN cannot be replaced.

I would investigate potential faults at the switch / cable.

[ac12]

I figured it out, partially.
The LAN port on the T61 will go to Gigabit.
But the LAN port on the docking station will only do 100bit. I had been doing all my network thru the docking station.

So any way to get the docking station (Type 2504) up to Gigabit?

[JBUK]

I have a 2504 dock which seems to work at the higher speed. I would check the cable contacts in the dock and switch because if you have any not connecting fully the lan will run at 100 not 1000.

[ac12]

Thanks for the idea.
Time to take out some contact cleaner.