Solution: Check that the mouse is properly connected to the computer. Make sure it is plugged in properly and that it is in the right port. Most serial mice will plug into the first serial port, COM1.
Problem: The mouse works in some programs, but not others.
Solution: Most likely the mouse driver isn't loaded. The driver lets programs communicate with the mouse. Some programs, like Windows, have this function built in. Others rely on the driver being loaded when the computer starts up. To make sure the mouse driver is being loaded properly, refer to the instructions that came with your mouse.
Solution: The mouse's driver may not be responding properly to the program. You can usually contact the mouse's manufacturer to get an updated driver.
Problem: The mouse seems to work, but moves erratically.
Solution: As the mouse moves, the roller can pick up dirt which builds up on the internal rollers. This causes them to stick and jump. A mouse clean kit will solve this problem.
Problem: As the mouse moves, it erases graphics and otherwise behaves erratically. This may be in some programs and not others.
Solution: This is almost always a mouse driver issue. The driver is not responding properly to requests from the program. Contact the mouse's manufacturer to get an updated driver.