Firefox email client

I'm using Firefox in suse 9.2. It works very well except for one strange problem. When I click on an email link or try to send a web page link address to someone, Firefox tries to open Evolution for the task. Kmail is set as the default mail client, and is used from Konqueror for mail tasks. I've searched the Firefox help both locally and on the web, and cannot see where this behavior is set. Thanks for any suggestions! Bernie Gardner w1az@arrl.net