Joomla 1.5.7 Admin panel not working

[habiby2u]

I have recently created a Joomla! site (1.5.7) and everything was working fine until yesterday. I tried to login as superadmin, and the page just keeps refreshing.
I've tried incorrect credentials and NO error messages were returned. (unlike what some other people got.)

I've read all the forums and tried all the tricks and DB hacks. It's simply not working. I can however solve one piece of the puzzle. I'm a systems test analyst, and through work i have access to test PC's each with different OS's. I have tried logging in using both Mac & Pc.

For the Macs i tried safari 1.5+ (older), safari 2.0+(Newer), safari 3.+(Latest).

Then for the Pc's i tried IE6, IE7, IE8 beta on Vista (sp1), XP(sp2) and XP(sp3).
I also tried cross platform browsers (IE for Mac) and (Safari for windows).

...and NOT one of these have been able to login. Therefore, putting to rest the Browser being the issue, the service packs being the issue, or some security patch being the issue. The Problem is clearly with JOOMLA! and NOT the OS's or Browsers.

In summary there is a serious problem if so many people have the same issue. Irrespective of PC/Mac IE/Safari/Chrome/etc. versions. The problem also seems to occur with the various Joomla versions. I've read in the forums, people have this exact issue from J1.0 to J1.5.7 (what i have). Something needs to be done about this... it's not very "stable" or dependable if critical issues are hanging around for 2+months without any action!

Not even Microsoft is this neglegent.
Has anyone had any progress with this?!

[sava]

This most probably is an issue caused by a flaw in Joomla or a component you have installed. However, I would advise you to post a ticket in your HelpDesk, so we ca check this.