ACAD 2002LT - Problems left mouse button

Hi folks,

I installed an old 2002LT version on an new DELL. All works fine except:

- mouse will generate QUICK INFO when moved on any Toolbox button.

- after pressing left mouse button the old command repeats instead of the selected button (for example LINE).

- all tool box buttons have good Quick Infos but only repeat the last command.

- When I start any command via menu, it works and it will be the next ' last command '.

Does anyone have any idea?

Thanks in advance

Petra Leber