Additional registration fields

Hi

I have problems adding fields to several pages.

1. Since there is no option to choose fields for the registration page, like there is for the table fields, how can I add fields to the form.
   
   I have tried to add in the Visual Editor by means of the insert field option, and it is displayed correctly in PHPrunner, but when uploaded, the added fields are not visible.
   
   In the HTML page I do notice a difference in the code between fields that are displayed and those that are not:
   
   {BEGIN last_name_fieldblock}<TR id=last_name_fieldblock>
   
   <TD width="50%" align=left>
   
   <DIV align=left>Last Name:</DIV></TD>
   
   <TD width="50%">{$last_name_editcontrol}
   
   &nbsp;<IMG src="images/icon_required.gif"> </TD></TR>{END last_name_fieldblock}
   <TR><TD>Telephone</TD>
   
   <TD>&nbsp;{$telephone_editcontrol}</TD></TR>
   Here the Telephone field is not displayed. I have tried to add the code manually like the Last Name field, but it didn't do the trick.
   
2. I have a table called users. In the visual editor the Add, Delete, Export Selected and Print Selected buttons are displayed. But once uploaded, only the Add is displayed.
   I'm wondering what it can be. I've spent a lot of time to get it right but to no avail.
   Hopefully you will be able to help.
   
   Thanks in advance.
   
   Ben
   Update: I've discovered that, when de-selecting the Encrypt Password in the security screen, the Delete, Print Selected and Export Selected are visible again. But not he added fields in the Registration Form.