How do I develop an app that makes use of my webcam: Logitech 400?

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Hi.

I have a logitech web cam, i can use in cheese, but in another apps like amsn it doesn't not work, i'm developing an app that uses the camera, but when i try to open it, in /var/log/messages i get this:

Apr 10 01:00:08 laptop abrtd: Directory 'ccpp-2012-04-10-01:00:07-23039' creation detected
Apr 10 01:00:08 laptop abrt[23040]: Saved core dump of pid 23039 (/opt/oframeworks/apps/pasto/bin/pasto) to /var/spool/abrt/ccpp-2012-04-10-01:00:07-23039 (15843328 bytes)
Apr 10 01:00:08 laptop abrtd: Executable '/opt/oframeworks/apps/pasto/bin/pasto' doesn't belong to any package
Apr 10 01:00:08 laptop abrtd: 'post-create' on '/var/spool/abrt/ccpp-2012-04-10-01:00:07-23039' exited with 1
Apr 10 01:00:08 laptop abrtd: Corrupted or bad directory /var/spool/abrt/ccpp-2012-04-10-01:00:07-23039, deleting

What can i do?

Thanks.