i can't use a webcam on ubuntu 9.10 karmic koala!

We don't need the make, we need the chip. Creative don't make webcam chips, they buy them and make cameras.

Can you give the output of:

lsusb

Thanks

Also, if you install cheese and lauch it, can you see yourself/

what you are talking about?
the Isueb
sorry i don't understand !
where i can get this thing?

press ALT+CTRL+T

Paste the command I gave, press enter and provide the output as an update

I'm guessing cheese didn't work...?

Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 002: ID 055f:c220 Mustek Systems, Inc. gSmart mini
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 002: ID 046d:c050 Logitech, Inc. RX 250 Optical Mouse
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 002: ID 0603:00f2 Novatek Microelectronics Corp.
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 005: ID 1058:1110 Western Digital Technologies, Inc.
Bus 002 Device 003: ID 07d1:3c0d D-Link System
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

is this what you looking for?

it worked. with a different webcam.

thank you.

I am unable to find webcam

Karmic is EOL. I suggest you reinstall with a clean install of Precise (Ubuntu 12.04 LTS)