Redirection problem.Please help

[BaHyXuH]

When my users try to log in there is a message shown as always in vbulletin-Login successful u will be redirected.After this message they are back to the index but NOT LOGGED.I have changed this log in/redirection template for something but i dont know which is this template and how to fix it.
P.S
I used some vb hack to make people be redirected directly to the previously post instead to the index page and i may have done sth wrong and i thing the problems comes from this.Could u please tell me how to fix it? ;]
10x anyway {}

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Please help me out.My members cannot login...;(

[wally]

check your cookie domain (if you can't access your admincp use one of the tools in the not upload folder of your vb install folder)

[BaHyXuH]

Nope.I can Access it without problems.I just need to know which was the hack that gets u bag to the previous page when you log in ?!?!
And Somehow the login system works from time to time...NOt only me but other members as well complains about this.
Please help me please....