Mouse can move but can't be clicked

[alphazero]

Dear All,

I have installled Linux Mint 9 in my Notebook (Lenovo G450) using mint4win and remove Gloria from my HD space.
It looks beautiful and I like it. I can browse using firefox, chatting using pidgin, etc.
But sometimes my usb mouse can't click. But I can move mouse cursor, when I clicked in somewhere like want to click close button / minimize button, nothing happend.

If this problem happend, I will use keyboard for accessing Linux Mint Menu and log out system, and restart to log in again.
And mouse will working normally again.. But sometimes this problem is happend again. It's too annoying if I must log out and log in again just only for fixing the mouse

Please advice what I should do

Thanks

[alphazero]

I have installed windows 7 too, and in windows 7 system, I never get problem like this. Port that I used for mouse is working properly