I had same problem with a Sitecom WL-140 v2 and Ubuntu 8.04 kernel 2.6.24-19-generic.
I solved after many search and test using ndiswrapper + windows drivers, then putting p54pci and p54common in /etc/modprobe.d/blacklist and ndiswrapper to /etc/modules.
Hi all
I had same problem with a Sitecom WL-140 v2 and Ubuntu 8.04 kernel 2.6.24-19-generic.
I solved after many search and test using ndiswrapper + windows drivers, then putting p54pci and p54common in /etc/modprobe. d/blacklist and ndiswrapper to /etc/modules.
It works like a charm now...
Best regards
blast