I have a problem with my linksys that when I enable security (WPA Shared, TKIP) I can't get an IP on my dowstairs machine (it gets low-medium signal). However, when I disable security, it connects fine. Any advice? I was doing the WPA PreSharedKey security with MAC Filtering enabled. My laptop connects fine, but the machine downstairs with a linksys wireless G card won't connect unless the security is open and mac filtering is turned off. Any ideas? Thanks in advance.