Schedule script is not executing some times

Dear Experts,

Once again i need your vital help to fix my issue, please do the needfull.

Issue:- I have schedule one script on windows server to run's every 10 min.(Script do check the alert log file,if database found down it send the email) While i'm doing the database down manually its sending email,
But when its automatically down (By some issue) its not sending the email, I beleive some thing worng in my schedule task, schedule screen shot attached pls help.

Thanks in Advance.

where is your script and what pattern you are checking in the logs ?

Is the same log pattern or error is coming in logs (when you manually shutdown and it crashes ? )

Thanks for helping me again Kamaraj, whenever database shutdown or crashes, we have massage in alertlog like "shutdown" and script look for this last fewlines if it is matches send the email. hope you understood my senario.

script look for this last fewlines -- if the shutdown pattern is not in the last few lines ( eventhough the DB is crashed ? )

howmany lines you are checking ?

Thanks for update, i checked in alert log if the database crash its dazen appear the "shutdown" word, Hence I need to add in code extra word "terminated instance".

Can you please help me into this how do i add the extra text in my code?
bold in existing code.

 
dim WshShell
dim f,fso,Filename
Dim arrFileLines() 
Const ForReading = 1
i = 0 
Set WshShell = WScript.CreateObject("WScript.Shell")
Set fso = CreateObject("Scripting.FileSystemObject")
Set objFile = FSO.OpenTextFile("C:\\blat182_b\alert.log", 1) 
' create the output file here 
Set objoutputFile = FSO.CreateTextFile("C:\\blat182_b\result_new.txt") 
Do Until objFile.AtEndOfStream 
Redim Preserve arrFileLines(i) 
arrFileLines(i) = objFile.ReadLine 
i = i + 1 
Loop 
objFile.Close 
For l = Ubound(arrFileLines)-5 to Ubound(arrFileLines) 
' write the output to the file 
objoutputFile.writeline arrFileLines(l) 
Next 
'Close the output file 
objoutputFile.close 
Filename = "C:\\blat182_b\result_new.txt"
Set f = fso.OpenTextFile(FileName, ForReading, True)
FileText = f.ReadAll
f.close
IF InStr(FileText,"shutdown", "Instance terminated") Then
 'Trigger the email - use blat or bmail utility
 Set WshShell = WScript.CreateObject("WScript.Shell")
 WshShell.Run "C:\\blat182_b\\mailsend -d xxxx.local -smtp xxx.xxx.xxx.xxx -t xxxx@xx.com, -c xxxx@xx.com  -f xx@xxx-xx.xx -sub ""Critical Alert  Database not running"" -m message.txt", 1, True
 'clear out wshshell variable
 set wshShell = Nothing
END IF
WScript.Quit

IF InStr(FileText,"shutdown") or Instr(FileText,"shutdown") Then

I want to check two clause one is

shutdown

and another is

terminated instace.

in my above code its not working...

can you post the sample log lines

otherwise, i cant help you

Condition 1:-For Shutdown

 
Mon Apr 30 17:52:16 2012
Completed: ALTER DATABASE DISMOUNT
ARCH: Archiving is disabled
Shutting down archive processes
Archiving is disabled
Archive process shutdown avoided: 0 active
ARCH: Archiving is disabled
Shutting down archive processes
Archiving is disabled
Archive process shutdown avoided: 0 active
Mon Apr 30 18:00:18 2012

Condition 2 Instance terminated:-

 
KCF: write/open error block=0x440 online=1
     file=2 X:\ORACLE\ORADATA\XXXX\UNDOTBS01.DBF
     error=27070 txt: 'OSD-04016: Error queuing an asynchronous I/O request.
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.'
Fri May 18 11:28:00 2012
Errors in file X:\oracle\admin\XXXx\bdump\XXX_dbw0_5728.trc:
ORA-01242: data file suffered media failure: database in NOARCHIVELOG mode
ORA-01114: IO error writing block to file 2 (block # 1088)
ORA-01110: data file 2: 'X:\ORACLE\ORADATA\XXX\UNDOTBS01.DBF'
ORA-27070: skgfdisp: async read/write failed
OSD-04016: Error queuing an asynchronous I/O request.
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.
DBW0: terminating instance due to error 1242
Instance terminated by DBW0, pid = 5728
 

in the old code, i didnt use the

 
IF InStr(FileText,"shutdown") or Instr(FileText,"terminating instance") Then

I want to use this both the condition in the script "shutdown" & Terminating Instance".

 
IF InStr(FileText,"shutdown") Then
IF Instr(FileText,"terminating instance") Then
...........
..........
..........
End IF
End IF

Thanks for update.
given conditions are placed in the script but its not filtering the words "Shutdown" & "terminated Instance" please suggest.