Hello Akemi & Others, Today I reformated my laptop Dell Precision M90 and installed the Fresh version of CentOs 5.2 and then took all the available update. In that update I got Kernel version update and now I am on Kernel-2.6.18-92.1.10.el5.centos.plus. I kept a file iwlwifi-3945-1.ucode into the /lib/firmware/ Now after restarting the computer my computer it is giving the following message on the startup. Bringing up interface wmaster : Determining IP information for wmaster .... SIOCSIFLAGS : Operation not supported. In the network manager it is showing my device i.e Intel Pro 3945 adapter but in the Inactive state. Please give me some suggestion so that I can figure out this problem. Thanks in advance. -- Ashish Vijaywargiya Indore (M.P), India http://en.wikipedia.org/wiki/Indore