OK back to my problems...
Installing 2.6.0 and upgrading it immediately gives no error, everything goes fine. Installing 2.6.0, importing my data dump from our server (2.6.0 too) and upgrading to 2.6.14 gives the errors listed above.
I tried the other way : I installed 2.6.0 and upgraded it to 2.6.14 immediately. Then I imported my data dump. Here is what I get during the import :
Notice: Undefined variable: global_vals in c:\program files\easyphp1-7\www\forum_math\adm\admimport.php on line 229
Warning: Invalid argument supplied for foreach() in c:\program files\easyphp1-7\www\FUDforum\include\glob.inc on line 81
Your current login (math_adm) is not found in the imported database.
Therefor you'll need to re-login once the import process is complete
Recompiling Templates
Correcting Avatar Paths
Correcting Attachment Paths
Import process is now complete
To finalize the import process you should now run the consistency checker.
When I try to run the consistency checker, I get this :
Fatal error: SQL Error has occurred, please contact the administrator of the forum and have them review the forum's SQL query log in c:\program files\easyphp1-7\www\FUDforum\include\theme\default\db.inc on line 55
I guess there is somthing wicked in my data dump ?
After that, if I try to go to the main page, theres
Fatal error: SQL Error has occurred, please contact the administrator of the forum and have them review the forum's SQL query log in c:\program files\easyphp1-7\www\forum_math\index.php on line 58