Dear Martin.
Thank you for reaching the Small Business Support Community.
Even though the wireless security authentication is the recommended practice, you can disable the "Security Mode" from the Wireless>Wireless Security tab. Just in case below is a link to the WAP200 admin guide as a reference;
http://www.cisco.com/en/US/docs/wireless/access_point/csbap/wap200/administration/guide/WAP200_V10_UG_Rev_B_web.pdf
I hope this is what you were looking for and please do not hesitate to reach me back if there is any further assistance I may help you with.
Kind regards,
Jeffrey Rodriguez S. .:|:.:|:.
Cisco Customer Support Engineer
*Please rate the Post so other will know when an answer has been found.
Jeffrey Rodriguez S. .:|:.:|:.
Cisco Customer Support Engineer
*Please rate the Post so other will know when an answer has been found.