Cannot Trigger Workflow when field BSEG-ZLSPR is changed.

Hi, I need to send a workflow when field BSEG-ZLSPR is changed via Transaction FB02.

I found that there are 2 Business Objects BSEG and BKPF with EVENT "CHANGED". I was unable to see any events getting triggered for BSEG or BKPF. Here is what I have done so far:

1. SWEC

- Event Linkage entries are created for BELEG - BSGE and BELEG and BKPF for Trigger ONCHANGE for event CHANGED.

- I have also added the restriction for field BSEG-ZLSPR from * to *.

2. SWETYPV - type Linkages

- Verifeid that type linkages are active.

- Created new workflow WS91500028 for EVENT CHANGED on Business Object BKPF.

- Used Standard SAP workflow WS00400012 for Buisness Object BSEG.

- I have tested using both the Workflows using SWDD to make sure that the workflows are working.

3. SWELS

- Activated Event Trace.

3. I now execute T-Code FB02 and double click on the selected line .. changed the field BSEG-ZLSPR .. I do not see any workflow triggered. I do not see any entries in the trace log also (SWEL).

Can someone please help.

Appreciate your help.

FYI :

When I look in SCDO for change documents object BELEG generation program.. below is what I see for generation info:

Dictionary structures

FBSEC FBSED FBSEG FBSEG_ADD FBSET