in case you haven't noticed, there is a forum area for discussions in English language (thus, I have moved the thread to the "English Board")
Concerning your question:
In order for other people to be able to give you any kind of advice, you'll need to describe your problem in detail:
-What kind of computer system are you using?
-Which version of MS-DOS are you using?
-What kind of keyboard and mouse connectors does your computer have? (e.g. PS/2, serial or USB mouse? PS/2, AT or USB keyboard?)?
-What kind of deviation from normal operation does the system show exactly? What makes you believe the system is taking your mouse for a keyboard?
“It is impossible to defeat an ignorant man in argument.” (William G. McAdoo)