I can not force IB to use a different temp dir, any Ideas?

I have tried

TMP_DIRECTORY 500000000 Y:\TEMP
TMP_DIRECTORY 500000000 Y:\TEMP
TMP_DIRECTORY 500000000 Y:\TEMP
TMP_DIRECTORY 500000000 Y:\TEMP
TMP_DIRECTORY 500000000 Y:\TEMP
TMP_DIRECTORY 500000000 Y:\TEMP
TMP_DIRECTORY 500000000 Y:\TEMP
TMP_DIRECTORY 500000000 Y:\TEMP
TMP_DIRECTORY 500000000 Y:\TEMP
TMP_DIRECTORY 500000000 Y:\TEMP

and

TMP_DIRECTORY 500000000 Y:\TEMP1
TMP_DIRECTORY 500000000 Y:\TEMP2
TMP_DIRECTORY 500000000 Y:\TEMP3
TMP_DIRECTORY 500000000 Y:\TEMP4
TMP_DIRECTORY 500000000 Y:\TEMP5
TMP_DIRECTORY 500000000 Y:\TEMP6
TMP_DIRECTORY 500000000 Y:\TEMP7
TMP_DIRECTORY 500000000 Y:\TEMP8
TMP_DIRECTORY 500000000 Y:\TEMP9
TMP_DIRECTORY 500000000 Y:\TEMP0


but it still creates a file in c:\winnt\temp

mike