Is my wlan device detected?

Dear list,...

I'm new in wlan world and linux kernel. However, i'm familiar with linux 
commands and environment.

I read Linux Wireless usage by Jean_Tourrilhe section 5 (how to identify a 
card). So I plug my USB wlan device, and i got this log:

Dec 11 14:51:22 sahabi kernel: usb 1-1: new full speed USB device using 
address 2
Dec 11 14:51:22 sahabi kernel: usb 1-1: SerialNumber: SN027009358               
Dec 11 14:51:22 sahabi /etc/hotplug/usb.agent[3810]: need a device for this 
comm
and                                                                             
Dec 11 14:51:24 sahabi kernel: prism2usb_init: prism2_usb.o: 0.2.1-pre20 
Loaded
Dec 11 14:51:24 sahabi kernel: prism2usb_init: dev_info is: prism2_usb          
Dec 11 14:51:24 sahabi kernel: drivers/usb/core/usb.c: registered new driver 
pri
sm2_usb                                                                         
Dec 11 14:51:24 sahabi /etc/hotplug/net.agent[3861]: SIOCSIFFLAGS: No such 
device                                                                               
Dec 11 14:51:29 sahabi ifup: No configuration found for wlan0

So the simple question is, Is my wlan device detected? Is it possible 
(somehow, patch the kernel or something) running on linux?  This is my first 
move since i read the docs. Any suggestions knowing this log?

Thanks,

Adinda Praditya