Dear Huang,
I really didn't understand about this parameter ..128*128*7*600.
You do the slice timing correction ,,,this way.
Session> put your fMRI images...(I guess you might be having 128 volumes)
No. of slices...>>enter ur value; say for eg. 24
TR>> enter ur TR; eg. 4 sec
TA>> use the formula TR-(TR/nslices). SO here it will be 4-(4/24)
Slice order>>
Check in ur fMRI parameter, whether u 're using ascending, descending or interleaved seq. then use the formula accordingly.
From ur eg. I think u're using interleaved ;bottom to top seq.
Reference slice>> 1 (u can use ur first slice as ref. )