>>>What exact error you are getting?
>>
>>There's no error, it simply does´n highlight the row i´m in.
>>
>>Maybe it´s because of my version of VFP5, because it works fine with VFP6.
>>
>>I´ll e-mail you a screen-shot, Check it!
>
>Could you try to drop the class on your form, set the required PEM and see if it works there?

Also, did you try it ot other PC's with VFP 5 installed?
I wonder what could be the reason, because I know that sometimes the DynamicBackColor with perfectly valid expression may not do anything and does not report an error.