Hi Yawei, have you looked in Device manager to see if there is a conflict with the= NIC cards. A yellow exclamation mark will indicate a problem. Click on properties, then Driver, update driver. Mike ~ one of the Moderators It is a good day if I learned something new. Editor MikesWhatsNews http://www.mwn.ca/ ******* Mike's REPLY SEPARATOR ********* On 10/31/2005 at 1:34 AM Yawei Guo wrote: Hello, I set up a gateway for my company. I plan to install two NIC on that PC with windows 2000 OS. One NIC is connected to the internal network of my company, the other NIC is connected to internet. But the PC can not start both NICs now. It isn't connected to the internal network while it is connected to internet. How do I configure them? Both are Realtek 8139 NIC. Thank you in advance Yawei Guo MSN: ywguo527@xxxxxxxxxxx The poor longs for rich, the rich longs for heaven, but the wise longs for peace. -- ** Remove the anti-virus footer, ads, and this line and everything below when replying ** For a web-based membership management utility and information on list policies, please see http://www.freelists.org/webpage/24hoursupport To unsubscribe, send a blank email to 24hoursupport-request@xxxxxxxxxxxxx with "unsubscribe" (without quotes) in the subject.