Keyboard sends increasing numbers

Hi,

I am new to xbmc. Even if every configuration is on default state, xbmc receives my keyboard typing as if they are increasing numbers.

For example let's say i want to type something on youtube plugin's search bar.

I type:

funny

I get:

01234

I have to use arrow keys on on-screen keyboard to type anything.

I don't know what to do or what is wrong with my setup? I even tried to find solution on google but couldn't find any (maybe I couldn't describe the problem on query)

my keyboard is this:

http://support.lenovo.com/en_US/product-...MIGR-74153

I am waiting your guiding replies, thanks in advance.