Problem with Swiss sim card

Question

Dear Experts,I bought my Dopod from Thailand, I worked very well with the telephone service provider in Thailand. The problem occured when I moved to Switzerland last 2 months. I tried a Swiss sim cards (both prepaid and post paid) and it shown an error message that the configuration of the Dopod need to be reconfigurated.Could you please advice or guide me abit how to configure it?Thank you very much in advance.Regards,Jantra.