Vista - Internet connection dropped after hibernation

Using Vista Home Premium on a Levono 3000 N100 laptop. Whenever I use the
Sleep or Hibernate feature, the wireless connection is disconnected whenever
the laptop is awakened from Sleep or resumed from Hibernate. When awakened
from Sleep or resumed from Hibernate, it shows that there is a connection
briefly, then it disconnects. Sometime it shows that there is a Local
connection but no connection to the Internet. The ThinkVantage Access
Connection (Version 4.31) will not reconnect automatically or manually. The
only way I can reconnect to the Internet is to reboot the laptop. The
Network Adapters are Realtek RTL 8139/810x Family Fast Ethernet NIV (Version
5.640.630.2006) and Broadcom 802.11g Network Adapter. The Wireless Router
is Netgear Rangemax WPN824NA. Any suggestions on how to resolve this?