Repeated Measures Post hoc Tests

I am trying to figure out where differences in behavior are between four treatment groups over a period of 9 weeks using Systat. I have performed the repeated measures ANOVA and there are significant differences present for both treatment and time, but I cannot figure out where those differences are.

I have done the Post hoc test for repeated measures where the factor is week. This gives me comparisons based on all the treatments combined for any given time period (all the cases for week 1 vs. all the cases for week 2). I need to look at comparisons that take into account the treatment and time period together (week 1 treatment 1 vs week 1 treatment 2 and so on). Is there a way to do this in Systat 12, and if so, could someone please fill me in, the manuals have been of little help.

Thanks in advance.