Go in the ACP to System -> Maintenance -> Update counters and choose "Update installation date" if this doesn't work, change the timestamp in the database.
Look if you have a thread with the date of 1 January 1970. Delete the thread or modify the timestamp in the database to 1213185804.
After that you can do what Synoxis wrote.
under which table in the database can i find the time stamp?
Table: wbb1_1_thread
Column: time
i want to change the installation time stamp not a thread one.
btw it changed by itself 
i didnt do anything to the database, i wonder why?!
I think the field to change is : wcf1_option/install_date.
But when I change that, then I do again an counter update, the date is back again to 1970
i beleive the counter update looks for the earliest post date and set installation date to it. we have to find a solution 
Guiwald, since u r in deseperate need to fix ill tell u how to modify the database directly:
run the following sql command and ull get the correct date:
UPDATE `XXXXXXXX`.`wbb1_1_thread` SET `time` = '1213185804' WHERE `wbb1_1_thread`.`time` ='0'
Don't forget to change XXXXX by your database name
let me know if you need further help 
btw dont forget to update the installation counter after that
But that modification is to set up the date of the thread with a date 1970 to the date of my installation right?
But as I told you, I don't think to have any message with this 1970 date. I may try to see directly on the database, but I can't handle that right now (don't have the right here 
)
But that modification is to set up the date of the thread with a date 1970 to the date of my installation right?
But as I told you, I don't think to have any message with this 1970 date. I may try to see directly on the database, but I can't handle that right now (don't have the right here
get your database login from wbb conf file and write a little php script that connects to the db using those credentials and that executes the sql query i just gave u
it should work that way
I'll try that when I'll be able to
Thanks!
I think the field to change is : wcf1_option/install_date.
But when I change that, then I do again a counter update, the date is back again to 1970
You have forgotten to delete the options.inc.php
Yes you can delete the options.inc.php in the wbb directory.
The Forum regenerated the File with the correct install_date from Database after that.
