Help please - em client not opening - 22,000 emails at stake

hello - came in this morning and tried to open emclient - but instead of just opening immediately like it normally does, it carries out a “database check” then gives this message:
System.Data.SQLite.SQLiteException: Some kind of disk I/O error occurred
disk I/O error
at System.Data.SQLite.SQLite3.Prepare(SQLiteConnection cnn, String strSql, SQLiteStatement previous, UInt32 timeoutMS, String& strRemain)
at System.Data.SQLite.SQLiteCommand.BuildNextCommand()
at System.Data.SQLite.SQLiteCommand.GetStatement(Int32 index)
at System.Data.SQLite.SQLiteDataReader.NextResult()
at System.Data.SQLite.SQLiteDataReader…ctor(SQLiteCommand cmd, CommandBehavior behave)
at System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior)
at System.Data.SQLite.SQLiteCommand.ExecuteNonQuery()
at System.Data.SQLite.SQLiteConnection.Open()
at DbRepair.DbTools.OpenConnection(String fileName)
at DbRepair.Form1.CheckCorruption()
at DbRepair.Form1.Check(Object state)

There are three things you can do to remedy this situation:

  1. Go to Start -> Run and type the following:
    “C:\Program Files\eM Client\DbRepair.exe” /checkall
    or alternatively, if you use 64-bit system:
    “C:\Program Files (x86)\eM Client\DbRepair.exe” /checkall

  2. Download a tool from http://www.emclient.com/tools/DbRepai… and run it.

After this action eM Client should start up normally. If does not, you will have to delete the database and restore your data from backup.This will remove all your settings and local items though!

Database location:
C:\Users%Current User%\AppData\Roaming\eM Client (Vista/Win7)
C:\Documents and Settings%Current User%\Application Data\eM Client (XP)

If you do not have backup file this might be a problem (you can learn a lesson from that), but you can try following trick: Leave the error message (if possible) open and go to Settings -> General -> uncheck “Send and receive messages at startup” -> restart eM Client -> export all your emails, contacts, tasks end events.
I hope it will help.