MY ENGLISH IS NOT GOOD,SO

You should be able to download the driver files from Mustek support by clicking here
Choose the Driver download support button, then enter your model (Bearpaw 1200 CU Plus) and download the drivers for your language.
If you need help installing the drivers, please see this link. Update Windows drivers

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!