Cannot delete contacts...help!

[drkbg]

I got into weird problem with my device. I cannot delete contacts from my phonebook. It seem that these are the contacts from my previous sim card that got somehow copied into the device, but now without the sim the are still there with "delete contact" menu item inactive. when I tried to insert another sim card, I got all the contacts from the second card together with the old contacts again in the phonebook, and again I cannot delete them...

How can I delete these contacts? the device somehow caches everything from the sim...:(:(