Venu,
For the label,
1. you have to create the label in SOTR_EDIT by entering "Text" field & "Alias".
2. Copy the same value from "Alias" field from SOTR_EDIT into the "Label Text for field" in SPRO.
Then you will see the field label is displayed with the text maintained in "Text" field in SOTR_EDIT.
Let me know if this helps.
Regards
Venkat