SPSS: Interaction of a covariate and factor

#1
Hi,
After I have found that the interaction between a covariate and factor is significant, I would like to know if each level of the factor has a significant interaction term with the covariate, or if only one of the levels is different than the other two in terms of the interaction term.

I can't figure out how to do this in SPSS. It appears that I need to write a contrast script, but I can't create a contrast for a covariate, and the resulting output does not display the interaction effect.

Any ideas would be greatly appreciated. I've attached my code below.
Thanks.
Sincerely,
Jon

Notes: JND is the dependent, Baseline is the covariate, Location is the factor.
UNIANOVA
JND WITH Baseline BY Location
/CONTRAST (Location)=special(-2 1 1, 1 -2 1, 1 1 -2)
/METHOD = SSTYPE(3)
/INTERCEPT = EXCLUDE
/CRITERIA = ALPHA(.05)
/DESIGN = Baseline Location Baseline by Location.