Roopa,
With your statement "But when I try to update the edited information to ECC,no steplets are being executed during the transmit and the changes were still existed in the device."
Need to check your transaction update step if it has some steplets listed in it.
Try to use the Agentry Test Environment to debug your transaction. Check before, during and after apply. Set breakpoints.
With your other statement "But the work order list screen is not displaying any "*" symbol." There is a rule tied to that * in the Agentry editor. Study the rule and this will give you some idea on why it is not firing for you.
With the two steps above, hopefully you can debug and find the reason why it is not functioning.
Hope this helps,
Mark Pe
SAP Platinum Support Engineer