I recently bought a compaq laptop that has Broadcomm wireless chip/card. The laptop works fine with my neigbours' wireless network but mine. And I am using verizon DSL. The router is Westell Versalink 327W. After researching on the internet I found that Verizon 327W router's firmware need to be updated. See the link: http://support.dell.com/support/topics/global.aspx/support/dsn/en/document?docid=125CFDEB0AFE10E1E0401E0A55174E79&journalid=BC50966C27EA11DB96E995E8363E7F84
To identify the problem, you might want to connect your pc to others wireless network if possible.
Good luck