AdobeMediaEncoder Closes APPcs3 without warning

[reko tomo]

Yesterday night everything worked OK
when I export timeline to AdobeMediaEncoder.

But this morning, when I’m ready to export
the timeline in premiere CS3 through
the Adobe Media Encoder option,
Premiere CS3 closes without
any warning messages or error messages

None act were conducted to my computer
after I shut it down last night to this morning.
No internet connection, no download file from media,
so there’ll be no virus attacked suspect.

any respond will be greatly appreciated.
thanks in advanced.

regards.