Hi.  I have an inspiron 1525 w/ the 1395 card w/ vista.   It connected fine for the 1st few months to my Linksys/ Cisco WRT- 54G .  Since then it sometimes refuses to connect even though I am next to the router w/ excellent signal strength. The other morning it booted up and ran great at 54 Mbps.  Why does the speed vary from 1-54, which causes it to drop the signal? Unless it is minimum,5.5 it won't open a window.  Any thoughts?  Thanks.