i have done that and i can't access my database again

all i get is

Database cannot be accessed or does not exist Please double-check the database name or contact your administrator to verify the database status

my client log looks like this

Python Version : 2.5.2
OpenERP-Client Version : 6.0.3
Last revision No. & ID :Bazaar Package not Found !Traceback (most recent call last):
  File "netsvc.pyo", line 489, in dispatch
  File "service\web_services.pyo", line 66, in dispatch
  File "service\web_services.pyo", line 338, in exp_migrate_databases
  File "pooler.pyo", line 60, in restart_pool
  File "pooler.pyo", line 39, in get_db_and_pool
  File "addons\__init__.pyo", line 883, in load_modules
  File "addons\__init__.pyo", line 719, in load_module_graph
  File "addons\__init__.pyo", line 420, in init_module_objects
  File "C:\Program Files\OpenERP 6.0\Server\addons\account\report\account_report.py", line 70, in init
  File "sql_db.pyo", line 78, in wrapper
  File "sql_db.pyo", line 131, in execute
ProgrammingError: cannot change number of columns in view