How can I use the purchasing category in requisition lines for approval workflow conditions?

we need different approvals for specisic purchasing category. Example, if category = "11" then appr.group = A,

if category = "12" then appr.group = B.

I’ve tried using the category ID, category name, and other fields, but the rule still doesn’t work.

Now i have rule like

IF
ReqLineDimension.categoryId isn't null
and
ReqLineDimension.categoryName is "IT OSS Software Support other (OpEx)"
and
ReqHeaderDimension.requisitionHeaderId is ReqLineDimension.requisitionHeaderId
THEN
List Builder Approval Group
Response Type
FYI
Approval Group SAM
Allow empty groups False
Rule Name "SAM11"
Dimension Id null

Probably somebody can give me right examle?

Thank you a lot