Loss of Internet connection through TC after sleep.

I have a Netgear ADSL Wireless modem which is connected to a TC in bridge mode.
So here is what happens, I am connected wirelessly to the TC and can access the internet no problem. I then put the MacBook Pro to sleep, then on waking the MacBook I have no internet connection. But if I select the wireless network of the Netgear I do have an internet connection. The MacBook then at some point reverts back to the TC wireless network and all works OK. I think it reverts back to the TC network after a sleep period.
It does not do this every time but it does it enough to have become annoying.
I presume that on those occasions that I have no internet connection through the TC that this is because the TC is otherwise occupied?
Is there a way to cure this problem?
Phil

Hi Larry,
If you go to Control Panel -> Network Connections (For Vista and Windows 7: Network and Sharing Center) -> Double click on your Network Adaptor (Vista and 7: Top left hand corner of the Network and Sharing Center, click on 'Change Adaptor Settings' and double click on your adaptor. Click Properties and scroll down to 'Internet Protocol Version 4 (TCP /IPv4), click Properties and make sure that 'Obtain an IP Address automatically' and Obtain DNS server address automatically' are ticked. Click Ok, then OK, then finally close. Check to see if you have connectivity. If you don't, go to start, in Run (Or in the search bar) type 'cmd'. Once Command Prompt opens, type 'ipconfig /flushdns'. Close Command Prompt and check again. If you still don't have Internet connectivity, go to Internet explorer and click Tools -> Internet Options (If you have Internet Explorer 7 or 8, press Alt before looking for tools. This will make the bar appear). Go to the Connections Tab and click on 'Lan Settings'. Make sure that you do not have 'Use a proxy server for your LAN' ticked. Also make sure that you have 'Automatically Detect Settings' ticked. Once you have done this, click Ok, Apply and Ok and check again for connectivity. If this didn't resolve your problem please post back
Sorry for the long answer
Cheers
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