Do bat files run in a different way when they are run from DirMon not command line?

[bashers]

I have a bat file which runs perfectly on its own.
It will not run succesfully from within dirmon and it keeps cycling.

"c:\program files\mplayer\mencoder" "%~dpn1.mpg" -edl "%~dpn1.edl" -oac copy -ovc copy -of mpeg -o "%~dpn1_clean.mpg"
if EXIST "%~dpn1_clean.mpg" delete "%~dpn1.mpg"
if EXIST "%~dpn1_clean.mpg" move "%~dpn1_clean.mpg" "%~dpn1.mpg"
del *.edl
del *.txt
del *.log

The file gets processed by mencoder but the delete comands don't so it keeps processing the same file.
Do i need to rewrite bat files so they contain paths to all commands?
I'd rather not as i'd prefer to only have the one file that i can run manually and also from within dirmon

I've just tried to see if i can do this with clean up but i don't think it is possible

[bashers]

I'm using this instead now

"c:\program files\mplayer\mencoder" "%~dpn1.mpg" -edl "%~dpn1.edl" -oac copy -ovc copy -of mpeg -o "%~dpn1_clean.mpg"
if EXIST "%~dpn1_clean.mpg" delete "%~dpn1.mpg"
if EXIST "%~dpn1_clean.mpg" move "%~dpn1_clean.mpg" "%~dpn1.mpg"
del "%~dpn1.edl"
del "%~dpn1.txt"
del "%~dpn1.log"
del "%~dpn1.logo.txt"