I've tried running userforms (both the stable release and trunk) in v2.3.4 and have had no success. It seems to install ok and looks good in the cms. You can create the page type and get all that tabs. However, I am unable to add new new fields on the form tab. I select the field type and press Add. A message 'Error Adding Field' appears in the bottom of the screen for any type.

I am taling my logs but no errors or warning appear. I'm not sure if I should do something somewhere to 'turn up' debugging.

Any help appreciated.

Put the site into devmode then using Firebug for firefox look at the error in the console tab. You should be able to view the full error message in the console.

If you cannot add fields make sure you have done a dev/build to rebuild the database.

Not so easy for me.... I'd definitely rebuilt the database.

Now I'm having an even more frustrating time. The CMS doesn't work at all with Firebug open. Clicking on anything now does nothing. As soon as I close Firebug it's all happy again (except for Userforms).

EDIT:

Just noticed that I'm getting the following, which looks like it is located in Userforms code.... (note error message after line 196!)

items: 'li.EditableFormField',
191 placeholder: 'removed-form-field',
192 opacity: 0.6,
193 revert: true,
194 change : function (event, ui) {
195 $("#Fields_fields").sortable('refreshPositions');
196 },
********* $(this).sortable is not a function
197 update : function (event, ui) {
198 // get all the fields
199 var sort = 1;
200 $("li.EditableFormField").each(function() {
201 $(this).find(".sortHidden").val(sort++);
202 });

I had the exact same issue while using userforms (trunk) with 2.3.4. However, the readme in trunk states that it's compatible with 2.4.0+ only. I guess this is because it makes use of some jQuery libraries that were introduced with 2.4.

I checked out the 0.2 branch and it works fine.
svn co http://svn.silverstripe.com/open/modules/userforms/branches/0.2 userforms