Cant use the after record event in child process

Hi

I have the following setup

2 x tables linked masterdata and scriptsdetails

eg
fields:
scripts name ____date

(child)
select scripts and it drops to scrips details
scripts____Bill smith____29.02.2011

|

|

pilltype_doctor___Comments
zimaxflor__Ted Will1 x 3 times a day

maxtoremGreg Wills_____2 x 1 times a day
i need to change the background cell color to red if its zimaxflor and blue if it's maxtorem

the list page after record processed event does nothig . I addded an echo "test" and nothing happened

The echo test only worked when i clicked in the "proceed to scriptsdetails",

but the background color change does not work ?????

Tried it in the scriptsdetails and masterdata

After Record Processed
$record["pilltype_style"]='style="background:red"';
Thanks