isght not recognized with ichat AV 3.1 (v417)

HI there,

My mom has an eMac with Tiger OS 10.4.3 and has ichat AV 3.1 (v417)

We have used the ichat AV often before. However, now it is not showing any video icon and we are not able to use the isights.

I went to iChat prefrences and under the video it says "There is no camera attached to this computer"

We haved updated all the software and I checked her isight on my G4 and it worked fine.

I thought that perhaps the firewire connection to her eMac might be damaged. However, I tried the isight in both of her firewire ports and it still was not recognized.

Any suggestions?

Thanks,
Carol