Hi Vijay,
I cannot see some of the important settings from your screenshot, so just a few guidelines:
1. Make sure that the Account type, Field name and Field value have the same last digit (e.g., all of them are "2"). This is probably correct (within one number, the fields are always sorted in this order).
2. In the definition of the search string for Account type and Field name, make sure that the search string itself does not return anything - else you end up e.g. with field name BKPF-XBLNRABCD which does not exist. If you need to put any variable value after the "X", then you have to create two search strings with the same input value but one returning this value (for Field Value), one returning nothing (for Account type and Field name).
3. BKPF-XBLNR is a header field, so it does not make much sense to fill Account type. Did you try to leave it blank? Maybe this could be the reason.
4. Other than that, I have no better idea than to go to the search string definition, copy the text from the bank statement and see if it reacts. Note that the search string only reads "note to payee" (whatever is in table FEBRE) and no other data that you can see on the statement.
Hope it still helps you. Good luck!