newbie needs help

Hi guys I've been trying to add a profile field in Dolphin 7. I've changed the system name, the caption name and the type of selector to "multiple" under the general tab then I've added a list of "possible values" under the advanced tab. . .however I'm now getting "Mysql error: Unknown column in 'Profiles'" emails. . . .

Can someone tell me how to fix this. I'm a novice so apologies if this is an obvious question

ER

you did it too fast and didnt let it write....it takes about 3 seconds after save for you the window to fade out by itself.....now delete any attempts at the old one and start a new one.

Thanks I've deleted it but still getting error message below when anyone tries to join

Found error in the file '/home/activesi/public_html/inc/classes/BxDolProfilesController.php' at line 116.
Called 'db_res' function with erroneous argument #0.

just going back over old replies and realised I didn't thank you for your help, so a belated thanks