DNS TSIG Key problems

Hello list... Had DNS, DHCP working, but now it stopped... I can't figure out what is wrong... rcnamed start gives: Starting name server BIND 9 /etc/rndc.key:1: key 'rndc-key': already exists When I try to configure via YAST, it says "Saving the configuration file failed" The y2log doesn't say anything usefull... Can anybody give me a tip as to where I should start looking? Jerry