[Zope] problem is SimpleUserFolder

[Sreekanth S Rameshaiah]

Hi, 
I have implemented [ simple user folder ] based acl_users. After
customizing all the zsqls , when i click  on acl_users i see a list of
check boxes followed by icons. but names are not being displayed. I
cheked the href . It has
http://202.56.252.23/abc/expert04/acl_users/manage_users?name=%3Cr%20instance%20at%200229C628%3E&submit=Edit

the getUserName sql is
SELECT DISTINCT login as NAME FROM staff

the getUserDetails sql is
SELECT login as NAME,pword as password,role FROM staff WHERE
staff.login=<dtml-sqlvar name type="string">

Am I doing anything wrong?

Regards,
  - sree