can you please answer to this question install:
Warning: mysql_error(): supplied argument is not a valid MySQL-Link resource in /home/hosting_users/ok50/www/doll/inc/classes/BxDolDb.php on line 329
--------------------------------------------------
Error
Database connect failed
Mysql error:

Debug backtrace:

Array
(
[1] => Array
(
[file] => /home/hosting_users/ok50/www/doll/inc/classes/BxDolDb.php
[line] => 77
[function] => see more error
[class] => bxdoldb
[type] => ->
[args] => Array
(
[0] => Database connect failed
[1] => 1
)

)

[2] => Array
(
[file] => /home/hosting_users/ok50/www/doll/inc/classes/BxDolDb.php
[line] => 56
[function] => connect
[class] => bxdoldb
[type] => ->
[args] => Array
(
)

)

[3] => Array
(
[file] => /home/hosting_users/ok50/www/doll/inc/db.inc.php
[line] => 25
[function] => bxdoldb
[class] => bxdoldb
[type] => ->
[args] => Array
(
)

)

[4] => Array
(
[file] => /home/hosting_users/ok50/www/doll/inc/admin_design.inc.php
[line] => 22
[args] => Array
(
[0] => /home/hosting_users/ok50/www/doll/inc/db.inc.php
)

[function] => require_once
)

[5] => Array
(
[file] => /home/hosting_users/ok50/www/doll/inc/admin.inc.php
[line] => 24
[args] => Array
(
[0] => /home/hosting_users/ok50/www/doll/inc/admin_design.inc.php
)

[function] => require_once
)

[6] => Array
(
[file] => /home/hosting_users/ok50/www/doll/inc/design.inc.php
[line] => 22
[args] => Array
(
[0] => /home/hosting_users/ok50/www/doll/inc/admin.inc.php
)

[function] => require_once
)

[7] => Array
(
[file] => /home/hosting_users/ok50/www/doll/admin/modules.php
[line] => 22
[args] => Array
(
[0] => /home/hosting_users/ok50/www/doll/inc/design.inc.php
)

[function] => require_once
)

)

Called script: /doll/admin/modules.php
Request parameters:

Array
(
[PHPSESSID] => 4a73b1cad725f83d7ce5dba32de27fe0
---------------------------------------------------
Fatal error: Call to a member function on a non-object in /home/hosting_users/ok50/www/doll/inc/classes/BxDolEmailTemplates.php on line 31

what should i do??