TestLink

Hello,all
I installed 1.9.7 in my server,MySQL is 5.5.22,but I can't login,the error as follows:
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DB Access Error - debug_print_backtrace() OUTPUT START

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#0 database->exec_query() called at [/var/www/testlink/lib/functions/database.class.php:555]
#1 database->fetchFirstRow() called at [/var/www/testlink/lib/functions/tlUser.class.php:259]
#2 tlUser->readFromDB() called at [/var/www/testlink/index.php:40]

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1. seems that there is some error with users table. (/var/www/testlink/lib/functions/tlUser.class.php:259)
check that you have the record for admin user.
2. details about PHP version, Operation System used are also important
3. if you are trying to evalute testlink => get Bitnami Virtual Machine or Bitname installer, may be will be a little bit easier
4. do a new fresh install

5. do not forget to register on mantis and get latest fixes after you will finish OK your installation

any news ? Any feedback ?

1.I'm admin user,and what is the record?
2.My Operation System is ubuntu 11.04,PHP is 5.3.10.
3.I need testlink in my work,so I will not use a Virtual Machine
4.I have reinstalled testlink 1.9.7 and 1.9.6 several times,but the same problem still exists
5.If I find some bugs or problems,I will submit on mantis.