You must have your security or cookie settings set too high. I am guessing you are using Internet Explorer? If you are go to Tools then click on Internet Options. Click on the Security tab and choose Internet. Make sure that it is not set on high. Click on the Privacy tab, and make sure it is not set on high as well. Hope this helps.
J0ker
Follow this if you haven’t tried it already:
Right click on My Network Places and choose Properties. Right click on Wireless Network Connection and choose Properties. Choose the Wireless Networks tab and under the Preferred networks section, choose the network you are connected to and click on Properties. On the Authentication tab, uncheck Enalbe IEEE 802.1x authentication for this network.
This hopefully will stop your computer from dropping your connection and reconnect again.