Unlinked clips

My videos are now coming in unlinked, even though under Modify the Link is checked and the Stereo is gray so it cannot be altered. I have looked around to find where I can set FCP 7 to bring the video in linked, but cannot find where. Can you help?

10.6.8
FCP 7
MacPro Intel
2.16 GHz
3 GB RAMM

Turn Linked Selection on.


www.derekmok.com

Thank you.