Dell Webcam Not Always Detected Having Problems With My Dell Inspiron 1525 Webcam?

Having problems with my dell inspiron 1525 webcam? - dell webcam not always detected

Can someone help me please? If only one answer to a question would be great =)

1) when I open my Dell Webcam Manager, and click the button on the web chat, always says "download video chat software, but finally, someone has to help a little?

And one final question:

2) when I open my webcam Center, she says, "No supported camera detected. Log in to continue ..." Need help? Because my computer automatically come with a buit in webcam