Laptop losing wireless connection

[adsl3g]

Hi can anyone help? My laptop is constantly losing its wireless connection to my home network and then uses an alternately configured IP address. Internet access is then dead - clicking 'repair' reconnects with a IP from the DHCP server which is a linksys WRT54 DD-WRT firmware). I have upgraded the wireless drivers on the laptop - (fujitsu siemens).
Running XP Home
Funny thing is my macbook never loses the connection.

are their any settings I can fine tune to fix this?

 

[antowan]

When does this happen? While you are working or when you bring it out of sleep or hibernation mode?

 

[The_Techie]

Try increasing the DHCP lease time on your router?

 

[adsl3g]

When does this happen? While you are working or when you bring it out of sleep or hibernation mode?

No, this can happen at anytime - one minute fine and the next "page cannot be displayed" - quick check and the IP has reverted to 'manually configured'

Try increasing the DHCP lease time on your router?

I did that shortly after posting the message. Monitoring it now - it was set up for 1 day - changed it to 3 days.