When attempting to register with newly installed Forum v 0.1.2 I get the following error:

Fatal error: Class 'CheckboxFieldDisabled' not found in /home/mysite/public_html/mysite/forum-v0.1.2/code/CheckableOption.php on line 8

Help!? Thanks!

Website Error
There has been an error

Is the standard error message. Put the site into dev mode to see the full blown error. You can put it in dev mode by adding this to your mysite/_config.php file

Director::set_environment_type("dev");

When clicking on register this error appeared:
[in dev mode]
Source
278     * @param codeOnly - Returns just the code of the IP instead of array( $CountryCode => $CountryName)
279     */
280    static function ip2country($address, $codeOnly = false) {   
281       
282       // Detect internal networks - this is us, so we're NZ
283       if(substr($address, 0, 7) == "192.168" || substr($address,0,4) == "127.") {
284          $code = 'NZ';
285       } else {
286          $cmd = 'geoiplookup ' . escapeshellarg($address);   
287          exec($cmd, $result, $code);   
288          // Note: At time of writing, $result is always zero for this program
289
290          if($code == 127) return false;
291          if($result == false) return false;
292          
293          // Always returns one line of code, e.g. :
Trace
Geoip::ip2country(86.95.242.147,1)
Line 324 of Geoip.php
Geoip::visitor_country()
Line 13 of CountryDropdownField.php
CountryDropdownField->__construct(Country,Country)
Line 170 of ForumRole.php
ForumRole->getForumFields(,1)

call_user_func_array(Array,Array)
Line 111 of Object.php
Object->__call(getForumFields,Array)

Member->getForumFields(,1)
Line 147 of ForumMemberProfile.php
ForumMemberProfile->RegistrationForm()

call_user_func_array(Array,Array)
Line 409 of ViewableData.php
ViewableData->XML_val(RegistrationForm,,1)
Line 984 of ViewableData.php
ViewableData_Customised->XML_val(RegistrationForm,,1)
Line 221 of .cache.home.*****.domains.*****.nl.public_html.forum.templates.Layout.ForumMemberProfile_register.ss
include(/tmp/silverstripe-cache-home-*****-domains-*****.nl-public_html/.cache.home.*****.domains.*****.nl.public_html.forum.templates.Layout.ForumMemberProfile_register.ss)
Line 350 of SSViewer.php
SSViewer->process(ViewableData_Customised)
Line 342 of SSViewer.php
SSViewer->process(ViewableData_Customised)
Line 166 of Controller.php
Controller->handleAction(HTTPRequest)
Line 107 of RequestHandler.php
RequestHandler->handleRequest(HTTPRequest)
Line 122 of Controller.php
Controller->handleRequest(HTTPRequest)
Line 262 of Director.php
Director::handleRequest(HTTPRequest,Session)
Line 106 of Director.php
Director::direct(ForumMemberProfile/register)
Line 115 of main.php