Invalid username - strange

Question

Good Morning,
times I need your help. Sorry for this english, but google was my friend
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10.5.6 XServe with several newly set up. As services are running AFP, DNS, OD Master, SMB. On the XServe via FC depends on a standard Promise raid on the The Home folder. Everything seems to run perfectly. On the client side I have a Mac Mini with 10.5.6
+ + + Problems + + +
I can communicate with the normal client login and home folder is by Server, etc. Now I have a very strange and annoying problem noticed.
On the server there are several releases (eg accounting). If I In the Finder on the left click of the server shares, is In the right above the large window that I am connected as guest. I click on connect and enter your username and password is that fails because username / password is incorrect. Connect me However, about "Connect to Server" there is no Problems and then I am on about "sharing" as a normal user and can work.
This issue also has the consequence that the automatically mount group folder for false passwords do not work. If, however, I have a folder with 'Connect to Server " mount and in the Startup folder, unpack, does it again entirely without problems.
On a 10.4.x client, these oddities are not to
I'm really desperate and grateful for every tip :((((
Greeting fom Hamburg and ever thanks in advance for the efforts.
Thomas

Answer 1

I figured it out. I had an AJAX call on page-load which was completely unrelated to the AJAX calls which were having issues afterward, and in the culprit AJAX call, I was not including the session ID (e.g., "+ $v('pInstance')"), like so:
  $.ajax({
    url: "/iatx/f?p=" + $v('pFlowId') + ":DROPDOWN_MENUS:" + $v('pInstance')
  })