Internet works only after restart in one of the laptop

In one of the laptop think pad t-60,internet access is possible only after restart. the person using the laptop hibernates while bring back laptop back to office after home use.Here back in office he docks the computer and able to login to company’s domain account but unable to browse the net either via company’s LAN or through the company’s wireless connection.But after reboot ever thing seems to work fine why is this happening and i don’t want to reboot the system to access the internet,
what can be done for this? please help me out.